Malicious PDF — malware analysis report

Static analysis result for SHA-256 61bbb6a7c202cff3…

MALICIOUS

PDF

72.8 KB Created: 2021-02-13 22:18:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4fd36abe38ce6c087dab90c16e892cce SHA-1: afa3bc67c10d4e0f26e683b197f4b8aeeae668ae SHA-256: 61bbb6a7c202cff3bc6ffceb06423df3fee5f987d138edea1bec234c64d904db
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/wix?keyword=aro+ace+awareness+week PDF link annotation
    • http://merishwheelrecords.com/72145626534gx0ka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_5fd92a3e1c7b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471464/normal_601ba8d2e2667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529024/normal_5fe0fad8747bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470828/normal_60038fd8dd03a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454971/normal_6003dbae0f697.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413455/normal_5ffde87b78abe.pdfIn PDF document text
    • https://visorupa.weebly.com/uploads/1/3/5/3/135305290/wolonirixerapew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476596/normal_5fcdf45a2e014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472213/normal_6023fc1a522fa.pdfIn PDF document text
    • https://nalusopiko.weebly.com/uploads/1/3/3/9/133997408/zipufimew-jerogik.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/lekelepowo/verofunorebefapunif.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/34332524129.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/23739463270.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/babylon_berlin_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/bb_key2_android_9.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/game_badland_brawl_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/gettysburg_armored_warfare_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/how_are_you_today_interview_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/foxufugagemakebafufil.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E5 4908 bytes
SHA-256: dcc87cea053192ce027002a8fe7eb375ca54920b35ad83cb6dfa7d982b752991
font_01_sfnt_off0000f2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B7 10308 bytes
SHA-256: 26dc11d3bb9a8c892b9fa7fd27e3aa1b1b7cadeb5e758093b58ba402d8bf3608

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