Malicious PDF — malware analysis report

Static analysis result for SHA-256 715d138e85dad577…

MALICIOUS

PDF

65.6 KB Created: 2021-01-25 15:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 52c8e211d2bf4e28be9ab7f4badf993b SHA-1: 16955ee37970976e546bb4e36fc2a1603534c3cc SHA-256: 715d138e85dad577a045e440164ecc99719949fa51d40beb1b47eef8d3fc181f
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://jacksth.ru/aws?utm_term=checkerboard+vans+platform+journeys PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416501/normal_600d91946ff40.pdfIn PDF document text
    • https://cdn.sqhk.co/sofetarunox/Siihjge/79869895286.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474191/normal_5ff3bfd596029.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451556/normal_5fccf520cb2a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505839/normal_60012624a1748.pdfIn PDF document text
    • http://radanews.site/disney_castaway_cay_map8v2t2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405202/normal_5fc85dd4237ae.pdfIn PDF document text
    • http://neo-tp.ru/lajakokilugidezef9rs4.pdfIn PDF document text
    • https://safubijob.weebly.com/uploads/1/3/2/6/132682970/zapipawe.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/iiialig/versace_chain_reaction_shoes_grey.pdfIn PDF document text
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/girumafobimeweto.pdfIn PDF document text
    • http://vzale.ru/simediladotexuvexuyfs.pdfIn PDF document text
    • http://hookup154.fun/fepikijabaxexejitefiraligqa9i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379219/normal_5fed3b18c056d.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/godewumazek/bepesepedavefi.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/47929220426.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/barron_s_new_sat_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/corrugated_sheet_roofing_materials.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_off0000c2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E4 5744 bytes
SHA-256: 690ded3d6931840baa3768c0a7b41c585569155e6b9ec9d98badad151776ecc5
font_01_sfnt_off0000d64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64F 10224 bytes
SHA-256: ff8d0a65187843e68ffb205c3729de9e4986d7d861fa81e1cebe4ef983a5471d