Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ecb64ef3d727af…

MALICIOUS

PDF

75.7 KB Created: 2021-04-06 09:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ffbf8ee855bf8d26c39d15503bc56b38 SHA-1: b77dd8f481eaf2643e82176c98dae591d5a65b80 SHA-256: 02ecb64ef3d727afb57cbafe337268a20d7325dae85b9e06f55660cfedcc0737
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9245

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://pelibifir.ru/strik?utm_term=shark+rotator+powered+lift+away+duoclean+reviews PDF link annotation
    • http://thedouche.xyz/bryson_tiller_true_to_selfuptu6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_5fe90f4fa2b97.pdfIn PDF document text
    • https://mawubuzepegi.weebly.com/uploads/1/3/3/9/133989242/1050056f6ca35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473039/normal_602f1724c35c3.pdfIn PDF document text
    • https://dexuganepo.weebly.com/uploads/1/3/1/6/131608037/wifanupegepuza-rodudetabigobav-zenig.pdfIn PDF document text
    • http://vittorguxx.site/what_is_the_difference_between_cradle_to_grave_vs_cradle_to_cradle0ukt1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393644/normal_6065d9e838d45.pdfIn PDF document text
    • http://silvanozito.online/city_mini_gt2r0lk5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_60495b180bc82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_6010aca4464db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5fd6810eeb82d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_600c97c3aa3b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529087/normal_605b64b5a37e3.pdfIn PDF document text
    • http://tryse.xyz/zazuzagmiqrw.pdfIn PDF document text
    • http://static-start.top/716330955019eg8o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452587/normal_6047eebe392fe.pdfIn PDF document text
    • https://rejafolurolege.weebly.com/uploads/1/3/0/7/130740622/duxukizurazolowiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424361/normal_600323b66dc2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529095/normal_6000f1452f282.pdfIn PDF document text
    • https://mazomolorir.weebly.com/uploads/1/3/2/6/132682829/45203.pdfIn PDF document text
    • https://roxeviviko.weebly.com/uploads/1/3/5/3/135317288/nejibovetosite-xebumabet-vejanudubiba-fuzuwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_d707456648cb40c9b2fae230dca37b9e.pdf?index=trueIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_17161a2b0ef143eba0f309eab94c65de.pdf?index=trueIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_e33eeb2153194268bf57a23e5908e20d.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B8 5664 bytes
SHA-256: 31fc78c6c14e5432185f4a6a187b237c827118ddaf6af00a7668200439078774
font_01_sfnt_off00010721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10721 11040 bytes
SHA-256: 54e8da8a263b160d7ec1d16ec704ee07c980c4f7d7df5da48d887cffeb830919

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