Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7feaf6995446fca…

MALICIOUS

PDF

77.9 KB Created: 2021-02-26 13:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a8924e9d7c5d9c7483aa6de0ec2ca3ef SHA-1: d98d6ec30871dffd0d845db74aeb0773e4f755a6 SHA-256: f7feaf6995446fca992a37df512bcf40dc4c547806973834ca9905ac35f0faca
186 Risk Score

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. It uses brand-impersonation credential phishing. 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://zunarorukozem.weebly.com/uploads/1/3/4/0/134016655/sonoketudisepuz-lotalafox.pdf.
  • 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://xajibur.ru/strik?utm_term=why+i+am+not+a+hindu+woman PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387036/normal_60220dc38f407.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/93764809658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421476/normal_60207f6b7eea3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476445/normal_6002c2b0e0689.pdfIn PDF document text
    • https://zunarorukozem.weebly.com/uploads/1/3/4/0/134016655/sonoketudisepuz-lotalafox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_600a903b000d0.pdfIn PDF document text
    • https://wavamabixalovag.weebly.com/uploads/1/3/4/5/134525364/galixiwuwog_bepure_mitalepoju_xakaz.pdfIn PDF document text
    • https://vawevoza.weebly.com/uploads/1/3/1/4/131482963/vukod.pdfIn PDF document text
    • http://loxapul.iblogger.org/film_ajari_aku_islam_indo_xxi.pdfIn PDF document text
    • http://setovewurepenu.22web.org/florida_financial_affidavit_form_12._902_c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/lekifo.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/degifu.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/sijosobapu.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_off0000f6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BF 4968 bytes
SHA-256: 399672ba62982c131d79b45fae9b4bad1c0229404572606ceedfd45ccfc23d0e
font_01_sfnt_off0001079b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079B 10496 bytes
SHA-256: 640faa68fb9202c36dd151fe829acbdcf49ad34ff132febd7f71537d3a0cdaba