PDF malware analysis — malicious · f4938559497bd020

MALICIOUS

PDF

82.2 KB Created: 2021-05-29 19:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: fe8c8d19eacde18976cf2347009a3fee SHA-1: 40ae2db9c30136a2444ed707dd2dc650bc99c50f SHA-256: f4938559497bd02041f4e45c16350fb49764c7d4595484ca3fc2abcdc639d1cf

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The primary URL, 'https://golowaki.ru/strik?utm_term=mebbis+kitap+se%25C3%25A7imi+nas%25C4%25B1l+yap%25C4%25B1l%25C4%25B1r', appears to be part of a campaign to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://golowaki.ru/strik?utm_term=mebbis+kitap+se%25C3%25A7imi+nas%25C4%25B1l+yap%25C4%25B1l%25C4%25B1r PDF link annotation
- https://fevebelok.weebly.com/uploads/1/3/4/0/134012800/wazeronepikopu.pdfIn PDF document text
- https://disemorabegelam.weebly.com/uploads/1/3/1/3/131383982/fa7b97b3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417327/normal_5fc9fbf62e4dc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486351/normal_601e37839aad4.pdfIn PDF document text
- https://gopaposoxawa.weebly.com/uploads/1/3/0/7/130740193/forupaxuromagoji.pdfIn PDF document text
- https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/26d2b28.pdfIn PDF document text
- https://pavexoseg.weebly.com/uploads/1/3/5/3/135315086/senepomezopuneduk.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484814/normal_5fe2a2705fe5c.pdfIn PDF document text
- https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/wuvapuw_ziguv_lezamonipifu_ripijokepu.pdfIn PDF document text
- https://kewalagaxed.weebly.com/uploads/1/3/4/8/134864879/pimidirun.pdfIn PDF document text
- https://rivupabageram.weebly.com/uploads/1/3/5/3/135323939/95ed4ad.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451045/normal_5fef137cf3d77.pdfIn PDF document text
- https://gomejewenikugi.weebly.com/uploads/1/3/4/8/134869664/vuratupisopuxalogojo.pdfIn PDF document text
- https://milafesubori.weebly.com/uploads/1/3/4/7/134745217/53a0929b9a9a8.pdfIn PDF document text
- https://giwadoveti.weebly.com/uploads/1/3/5/3/135305904/905577.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366316/normal_5ff97c396e94b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490953/normal_604e3ecc72968.pdfIn PDF document text
- https://kivasemav.weebly.com/uploads/1/3/2/6/132680863/3265789.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372960/normal_604cf1be2e2e0.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f297.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF297	5168 bytes
SHA-256: `3727a007ee4df335d3e078a0c1b930d1481155af6a01f5281c90e6b5274ec8be`
`font_01_sfnt_off00010410.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10410	12996 bytes
SHA-256: `338a1613ebfb7a4a39ce2c4b9bf1d2ad70625f4c1fced481ca36a4b9df51d63a`
`font_02_sfnt_off00012b91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B91	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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