Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab121a03cfa64fb0…

MALICIOUS

PDF

60.6 KB Created: 2021-01-21 20:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d478aead311e708bf484718c8436c7d5 SHA-1: 8cb5888c97db1e25999e462c7813bff6ff196070 SHA-256: ab121a03cfa64fb0d2ec2704aecf2142de5c2dfde4166813d69c958ad83d1859
136 Risk Score

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
  • 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://baarspo.ru/wb?keyword=pnm%20pure%20nintendo%20magazines PDF link annotation
    • https://cdn.sqhk.co/fazejitev/bdjhETQ/61704979857.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402711/normal_5ff0670a986ec.pdfIn PDF document text
    • https://cdn.sqhk.co/zafowavo/e5GjegI/weedmaps_lansing_gage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450638/normal_5ff75649295ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fdeade96050d.pdfIn PDF document text
    • https://cdn.sqhk.co/xamapetarel/idVOHhe/bekid.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/ijanId7/kosotodokezikikabivajopa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489251/normal_60025994d2e56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390999/normal_5fe25f70b3312.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5ff338afaa0d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480736/normal_5ff49a1ea5d6f.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/tetofamuxulil/sudap.pdfIn PDF document text
    • http://gesesasogibigaw.rf.gd/piladitowunujodima.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/camscanner_premium_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/blumen_blattform_aarau.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_off0000b1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F1 5300 bytes
SHA-256: 138869a28dfe6e7acc039f03a35dbfc27c8d614fbd7513797fec3e3001b59cf9
font_01_sfnt_off0000c3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E5 9896 bytes
SHA-256: d5f911b5d11cc870d8bb4d9c4d10d5f84cd3cd528a8445cf4a761a062202d676