PDF malware analysis — malicious · eab69d36bf274479

MALICIOUS

PDF

78.9 KB Created: 2021-08-19 15:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20

MD5: 716bb02d77ffd448098f9d1c639286dd SHA-1: 12bbd16dd1d3c880f911ca52bcfd4c180ae0c15a SHA-256: eab69d36bf2744790513e62f2a81a2805fb1990159b042629f1040425632a966

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. These links likely lead to phishing sites or further malware downloads, aiming to exploit users through deceptive content.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

Heuristics 6

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 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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52610898c1---95858666338.pdf In PDF document text
- https://gbagencement.fr/uploads/file/toditirujofo.pdfIn PDF document text
- https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/6fde99c74fe01f1dc5af18178072a76f/7997864919.pdfIn PDF document text
- https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/u6sf406526kq6krgvppa77cvtk/leremuxaxiregi.pdfIn PDF document text
- http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd72e5a4f65---46912556967.pdfIn PDF document text
- https://tennis-samara.ru/img/file/lonezosafoporamuvetoj.pdfIn PDF document text
- http://popeyebio.com/upload/files/29244031592.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4da93c72b9---5092290015.pdfIn PDF document text
- http://teknis.it/userfiles/files/52644007563.pdfIn PDF document text
- http://asijskepotraviny.cz/files/file/41914871584.pdfIn PDF document text
- http://cmrivestimenti.com/userfiles/files/10613684444.pdfIn PDF document text
- http://tai-yang.tw/taiyang/upload/file/dupimubo.pdfIn PDF document text
- http://sualpturizm.com/userfiles/file/damapifa.pdfIn PDF document text
- https://alianzatours.com/imagenes/file/22474084808.pdfIn PDF document text
- https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/b82f6e919e6280442a7c81c15b2eedb8/borefax.pdfIn PDF document text
- http://mwcapital.net//ckfinder/userfiles/files/vefutidujo.pdfIn PDF document text
- http://panziofabian.hu/fck_kepek/53931132040.pdfIn PDF document text
- http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076887def09e---popizuxipez.pdfIn PDF document text
- https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/67cb33e3a3ed7a27e45d7dda75636f95/fatasalobogodinefites.pdfIn PDF document text
- http://webcertain.net/contentupload/fckeditorUploads/organization_/file/lepitadifadivobugasiro.pdfIn PDF document text
- https://decoveinvestment.com/userfiles/file/setizapaxebutumegopilil.pdfIn PDF document text
- https://strechybenesov.cz/content/69663710191.pdfIn PDF document text
- http://slsnn.ru/content/file/fetofafiruxibun.pdfIn PDF document text
- http://kibbkw.com/uploads/files/69075055017.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=leadership+theory+and+practice+8th+edition+kindle+editionPDF link annotation
- 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_off0000cd33.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD33	10980 bytes
SHA-256: `f7d08b5c735fb94e925f8e4eaad7a871d2adeb61219e9c0725e0b45e7b8e308e`
`font_01_sfnt_off0000e6a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6A2	16768 bytes
SHA-256: `f8946a74d93d039517375b220b3c1aadb1fb3f1c27e361a82190543fe9c77b28`
`font_02_sfnt_off0001126e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1126E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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