Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cac6ea202a49339…

MALICIOUS

PDF

75.1 KB Created: 2021-03-14 08:54:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 93bb88472ce3be46c60476208f181fbe SHA-1: 9a8cf73293af7cb022908a251c9157db8ff153c6 SHA-256: 5cac6ea202a49339ec54194f7e852cfdb6a2217fb3eacb47a7e06f8463933097
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/award?keyword=mathematics+rules+pdf PDF link annotation
    • https://luletifolavok.weebly.com/uploads/1/3/4/3/134369244/3195542.pdfIn PDF document text
    • http://redpandarecycling.com/gekadakutusuvetefomumue5f.pdfIn PDF document text
    • https://jerepukiw.weebly.com/uploads/1/3/2/6/132681878/godug.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/74129872919.pdfIn PDF document text
    • http://basvuruizleme.online/referat_atresia_anign815.pdfIn PDF document text
    • http://shopsupergood.site/how_to_make_bows_with_ribbon_for_giftsc5x9d.pdfIn PDF document text
    • http://kirererusuk.iblogger.org/88102955374.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/nidivaxafezetofelu.pdfIn PDF document text
    • https://gubelowilesatu.weebly.com/uploads/1/3/0/7/130739845/8729902.pdfIn PDF document text
    • https://rudabukonavapuk.weebly.com/uploads/1/3/4/0/134016662/5649858.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/lg_refrigerator_lfx28968st_freezer_not_working.pdfIn PDF document text
    • http://requiremcgood.com/mudorudery77.pdfIn PDF document text
    • http://setifol.66ghz.com/95908409527.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sitovimewimes.rf.gd/gavezuxojoluxutodovefix.pdfIn PDF document text
    • http://gozulejawefufap.epizy.com/cheat_engine_6._5_1.pdfIn PDF document text
    • http://gajedimigifupet.epizy.com/60947628660.pdfIn PDF document text
    • http://xewaxal.epizy.com/game_parlour_business_plan.pdfIn PDF document text
    • http://jegowijuvu.epizy.com/24269681922.pdfIn PDF document text
    • http://jovigoxuja.epizy.com/ketaman_asmoro_cover.pdfIn PDF document text
    • http://pibixokemur.rf.gd/wogibawoxedoriranituzo.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_off0000e890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE890 5400 bytes
SHA-256: 84de78354e7c750bb1e2df64967db6b4418c9b9094f6f65933a3caabe4b3bb2b
font_01_sfnt_off0000facd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACD 10772 bytes
SHA-256: 8ea55421c4ab1f89f1de228e5785669a5dffb67d177b56b9dc48f10ec5226606