Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d503921a88b60c0…

MALICIOUS

PDF

75.0 KB Created: 2021-03-24 07:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5683757e8b7fd5c900f081a50448720d SHA-1: 5b02382b41cb270dd4f13cb6b16c12a19ba69c49 SHA-256: 6d503921a88b60c0e409cb441addedee5dfa723d26b79cdf9c591027c6d4f25a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9994

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 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.
  • 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://maypoin.ru/123?utm_term=bajirao+mastani+tamil+full+movie++tamilyogi PDF link annotation
    • https://jagotizepevex.weebly.com/uploads/1/3/4/4/134464701/tewuvitop.pdfIn PDF document text
    • https://babuzusevajuwo.weebly.com/uploads/1/3/4/8/134878483/32e8d17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_5fd778272aba5.pdfIn PDF document text
    • https://giwizakewat.weebly.com/uploads/1/3/1/8/131857916/27f5bef7af9cb7b.pdfIn PDF document text
    • http://keruxiwu.22web.org/81042994337.pdfIn PDF document text
    • http://jejederepox.medianewsonline.com/2502197470.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/what_is_a_custodian_of_records_affidavit.pdfIn PDF document text
    • http://werewov.22web.org/xijodisomebemijimidi.pdfIn PDF document text
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/kogupuguvirobeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422385/normal_5ff65838ce737.pdfIn PDF document text
    • http://fegiroxopirez.sportsontheweb.net/xokipenu.pdfIn PDF document text
    • https://wumifidadorubip.weebly.com/uploads/1/3/5/2/135298964/3815794.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/jezekemunidup/28114554538.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/dugokifapisewume.pdfIn PDF document text
    • http://wepebafefik.rf.gd/77198644087.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/57434463734.pdfIn PDF document text
    • http://bokatamekal.rf.gd/38916093411.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/plan_de_negocios_food_truck_mxico.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/how_to_charge_black_and_decker_300_amp_jump_starter.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/nirupebe.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/kikubigapiwapetisepoti.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/80338238585.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32A 5376 bytes
SHA-256: 85dcc978d52e89bede8139768173e78f25cdd5fa65f54ca88ffb392e5d0bd4c2
font_01_sfnt_off0000e576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE576 10272 bytes
SHA-256: c3f8d89d99c22dde6d28b20f57571fc190f68e6ed8754eabf030e45033677929
font_02_sfnt_off000108bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BD 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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