Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2bd966646967c9a…

MALICIOUS

PDF

70.7 KB Created: 2021-02-12 00:29:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 04997393885560510b0ca0eb9d8d0223 SHA-1: f9bab60a4f3c933453ca12c5243e047883b57f1c SHA-256: d2bd966646967c9a077c2c24a71f5f06acec6e6cd932f1d534837f373e6f44c5
222 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. Another heuristic indicates a large number of external PDF links, suggesting a link farm. The document body, though heavily obfuscated, contains text related to 'app like play store apk', reinforcing the lure. The presence of embedded URLs and the 'SE_INVOICE_LURE' heuristic suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://crophysi.ru/wb?keyword=app%20like%20play%20store%20apk In PDF document text
    • https://cdn.sqhk.co/vitozogog/9Y8pbja/joxibotukedolelotilimona.pdfIn PDF document text
    • https://cdn.sqhk.co/menaleratupo/gjdphgc/yo_arcade_cubefield.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/hjjRZ8j/67672258388.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/ijW3icA/crash_cart_drugs_and_their_uses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489061/normal_6015308e4771a.pdfIn PDF document text
    • https://lepabamun.weebly.com/uploads/1/3/1/6/131636917/vitugasamovuravinase.pdfIn PDF document text
    • https://cdn.sqhk.co/nulegudup/ic2hagd/insideout_coaching_resources.pdfIn PDF document text
    • http://trychambre.xyz/fluoro_guided_hip_injection_side_effectsaapm6.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/FuAVjbT/viratenajufuteso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504870/normal_5fe3f773b4cfa.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/tojazudibumogab/glory_betting_tips_ht_ft_vip_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/meporetigesi.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/kosakunatinunojawaliwoba.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/format_section_break_word_2010.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_off0000da6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6F 4968 bytes
SHA-256: 2093cf8c475bb291200db45815a43be7c5e0f55ce89762d92b22d3ac4bd8495a
font_01_sfnt_off0000eb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6C 10224 bytes
SHA-256: 20139c04a2a9df9e64a16ecb4d47c7fa4b9c5fd885f0acd693e922f6c9f35dfa

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