PDF malware analysis — malicious · 4a96e0c31a3f705d

MALICIOUS

PDF

85.4 KB Created: 2021-08-18 11:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: d1711006d6febbf84f0fce9f93a611e8 SHA-1: baefae94f4dc4a84a49ea79d36fbd2e67b2dbd34 SHA-256: 4a96e0c31a3f705d60dc126cb4de4a91f46541429e34aa6ac143e586e3a8ebf2

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF file that contains numerous links to external websites, many of which are hosted on compromised WordPress installations. These links are likely used to redirect users to malicious sites for phishing or to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://drafthe.ru/uplcv?utm_term=alcanos+del+1+al+100+nombres+y+formula+molecular PDF link annotation
- https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160780e8dbcc4c---memipudedamer.pdfIn PDF document text
- http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45da90a725---53720260366.pdfIn PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa04656d352---zuruxudisud.pdfIn PDF document text
- http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba03abd08f0---16527237998.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f40c17e4a5---nafotisudifirotifobiwo.pdfIn PDF document text
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8297ac434---36883208912.pdfIn PDF document text
- https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/mk3v0lemu1okinua9rbpcicr57/wumijupunixeroza.pdfIn PDF document text
- http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908d5b4f170---81789135636.pdfIn PDF document text
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/a5e0736c58c3873fa1f581d3f24946f6/nimuwegipedefi.pdfIn PDF document text
- https://www.natursany.com//ckfinder/userfiles/files/6075139420.pdfIn PDF document text
- https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/0e054d8cb0ca87dc901ac8d41c342726/liwawireduwi.pdfIn PDF document text
- http://aucoindeshalles.com/menu/file/barolimemo.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b83ce415325---migimurawusatapato.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/oi36ofqn50pefpkkrmqlh852rl/fawatabora.pdfIn PDF document text
- https://relans-nn.ru/images/docs/file/xamuvejimobitu.pdfIn PDF document text
- http://labuchedeberce.fr/userfiles/file/26038856314.pdfIn PDF document text
- http://satisfytech.com/ck/upload/files/gigeje.pdfIn PDF document text
- https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/kjm85g4hr8b935dv39dduoc1o5/72885634777.pdfIn PDF document text
- http://koreaseals.com/ckfinder/userfiles/files/xabapizirolovafit.pdfIn PDF document text
- https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/rbg5dkat10v99o99oeku9hftpu/japojewepobel.pdfIn PDF document text
- https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81f93b2d3---wimejawazazesizetimi.pdfIn PDF document text
- http://dae-young.kr/upload/fckeditor/file/76856137682.pdfIn PDF document text
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c4a081962793e3482f2055df2ad2133a/zunejunalegiwamot.pdfIn PDF document text
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/ada4c94da5a112e447543bd48a5752f9/60570838.pdfIn PDF document text
- http://sakaryakasaplarodasi.org/userfiles/file/fuzanesakejivujazifekew.pdfIn PDF document text
- https://ipekyolumedya.com/resim_galeri/file/dimexanatorisamabif.pdfIn PDF document text
- https://biomedchita.ru/imeg_master/file/wutubagabozugewavago.pdfIn PDF document text
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160db97f5d5d25---43153998436.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e421.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE421	10956 bytes
SHA-256: `f1ce023ef2d56b5b7944c33b4b6b6467840ec7ad7f84cdbd5f57f08e1c02cc54`
`font_01_sfnt_off0000fda4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDA4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000115b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115B6	18424 bytes
SHA-256: `4a589f4a2a4ff86a17982a6175ab3accb4cd6e2f6d939f02cd9a19dde8386380`

Open this report in the interactive analyzer, or submit your own file for analysis.