PDF malware analysis — malicious · bbe8055b58ebdb54

MALICIOUS

PDF

114.3 KB Created: 2021-07-24 10:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: daef05f53371c08bec97ed008752ce70 SHA-1: 69d153a65e3af0324bff6f62382c2e4aade37b90 SHA-256: bbe8055b58ebdb546a96ea291f818c7752971432bb6eb91b72cbd7d0d3c26d17

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9598

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 https://pavimenti.pl/web/uploads/files/karinesalojogebenu.pdf In PDF document text
- http://lamelove-zakryti.cz/userfiles/file/lamajejigesijomojevi.pdfIn PDF document text
- https://chiuman-hk.com/images/file/sugasuno.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/a858e795c7b310c94ae27db5c74ac87c/22966548324.pdfIn PDF document text
- http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a875365e65a---74685905258.pdfIn PDF document text
- http://uptownherndon.com/uploads/files/golexeduniwebelosoxafopan.pdfIn PDF document text
- http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fcb38291f---7188081490.pdfIn PDF document text
- http://bezagsecurity.cz/userfiles/timajebuvideliteru.pdfIn PDF document text
- http://bigband-ulm.de/userfiles/files/fozedabuduf.pdfIn PDF document text
- https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/0cb7j22eus2dldpufjdupnl2cd/fulafelowogowunepife.pdfIn PDF document text
- https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/dd0a6068929ed841c0409792cf9c4e35/75484773921.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077368d897d5---xamarikipuzosunatutoxa.pdfIn PDF document text
- https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/ec6f2aff6fb89772fb82f5f1ffb9b024/8259747003.pdfIn PDF document text
- http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16088630789bbe---bakum.pdfIn PDF document text
- http://com123.vn/uploads/file/36411264534.pdfIn PDF document text
- https://childprotectionindia.com/lexcyberia/userfiles/files/90515208493.pdfIn PDF document text
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee379b6c0d2---sujikaposefekud.pdfIn PDF document text
- https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/cfbccfe0445d114c7293dd52b08c7805/90124980929.pdfIn PDF document text
- https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe6c8666e4---situteri.pdfIn PDF document text
- http://thegioioto.store/upload/files/55343073152.pdfIn PDF document text
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160edb4702aee8---woxuzidovadidedolomivizu.pdfIn PDF document text
- http://igigeothermal.jp/userfiles/file/38398973712.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d96840fd8---72899837859.pdfIn PDF document text
- http://aisef.org/uploads/userfiles/file/file/zifepe.pdfIn PDF document text
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c988b0214c---45331379442.pdfIn PDF document text
- https://sasalidayanisma.org/uploads/file/24462041352.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+leave+a+whoop+teamPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00014929.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14929	17368 bytes
SHA-256: `002738261c53722313f120014103b2f9d62918c196b949a31019613d7ec2e5f8`
`font_01_sfnt_off000176aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x176AA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00018ebb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18EBB	16140 bytes
SHA-256: `00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b`
`font_03_sfnt_off0001a438.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A438	10196 bytes
SHA-256: `7cfe601a6dcb7a5ae46c9e7fcad3c45b73bb664ffe93c3f5e5b7735a7bcd3ff5`

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