Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ffb7db555a29633…

MALICIOUS

PDF

63.0 KB Created: 2021-02-11 23:38:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d7891831b706ac96827af53735fbe92a SHA-1: 87de6de88a8ee9fbd482a86eaed2fc71c9ea7871 SHA-256: 3ffb7db555a29633c49985efaa6f2d3cae7d52bb5ff5b1a6fcf1b3857ef97437
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://seumenha.ru/wix?keyword=football+strike+apk+uptodown PDF link annotation
    • https://garowowo.weebly.com/uploads/1/3/6/0/136033653/0ba48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497638/normal_5ff632e2da09c.pdfIn PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/986499.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/6545734.pdfIn PDF document text
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/2696724.pdfIn PDF document text
    • https://mulunumidivopiz.weebly.com/uploads/1/3/5/3/135393794/dinobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_60251a67ba5da.pdfIn PDF document text
    • http://enots.space/pofusaxesowitifika6ctow.pdfIn PDF document text
    • https://pebujekug.weebly.com/uploads/1/3/4/3/134380671/c2a7260d1e.pdfIn PDF document text
    • https://zovijopafirol.weebly.com/uploads/1/3/4/6/134630452/xavijepejov.pdfIn PDF document text
    • https://viwukafum.weebly.com/uploads/1/3/0/7/130738591/8350649.pdfIn PDF document text
    • http://maddot.space/dunugujokakpjfir.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/class_10_science_ncert_solutions_up_boardi9x6l.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/jevedijadiki/aerobic_fermentation.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/pisibigarokiwok.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/audacity_windows_xp_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/63299823776.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_off0000bb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2B 5204 bytes
SHA-256: 35ae6dadd90f47eb1614f4843e4c4ac69da26040498c3107c8b32d75e7d0866c
font_01_sfnt_off0000ccf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF8 9896 bytes
SHA-256: 0b5830c898c82e673d176034015a1dc54eb56838335c1bb76e9b54e965d10981