Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b78ad8be2e2d95…

MALICIOUS

PDF

78.9 KB Created: 2021-02-10 12:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 42248a952bb369237ece30db10efec10 SHA-1: 7d483ca6879fa579bd9f4193fa83b46c0e03c46b SHA-256: b1b78ad8be2e2d95dab83d5e75a28b9f2906040f174f6909ee4cb0b263c57c56
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' suggesting a large number of outbound links. The document body, though heavily obfuscated, contains text related to 'Magic the Gathering deck building tips' and metadata indicating it was generated by wkhtmltopdf, a tool often abused for malicious purposes. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://baarspo.ru/123?utm_term=magic+the+gathering+deck+building+tips PDF link annotation
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/1438928.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368752/normal_60078b20d6d22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451567/normal_5ff661e77ed8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487200/normal_5ffa290bd449f.pdfIn PDF document text
    • http://meetchat.space/superlative_activities_worksheets2twe9.pdfIn PDF document text
    • https://surevasod.weebly.com/uploads/1/3/1/8/131856145/1023403.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411246/normal_5fdf36b7d98b3.pdfIn PDF document text
    • http://shoop-fl.ru/togowaeu4l0.pdfIn PDF document text
    • http://datab.vip/35995200873e2fk4.pdfIn PDF document text
    • https://gusupaserilobe.weebly.com/uploads/1/3/5/3/135312632/7076c60ed8df0e0.pdfIn PDF document text
    • http://summ-ita.space/4683471069248l8g.pdfIn PDF document text
    • https://xixilizuxuwogag.weebly.com/uploads/1/3/4/8/134879277/00906e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mulerux/22509375029.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/facebook_all_photos_from_post.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/fojixuwizab.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/xusubovupox.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/egypt_human_development_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/131258504.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/99282905553.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/carry_on_jatta_punjabi_movie_full.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/movie_minority_report_cast.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF35 5544 bytes
SHA-256: 64940146ed182fafa3274f16fdeccb4ca5ea988dbeee32e23a1f62c9380c0a11
font_01_sfnt_off00010201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10201 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 10172 bytes
SHA-256: 338d924b6a2f27604ac3385fb78c7c635850b2c0556d01be2fd53cc5c0813d7d

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