Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd32ab9c4f8e519…

MALICIOUS

PDF

76.1 KB Created: 2021-02-18 14:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40eea6bebddd2367c848b1c0c2f93c32 SHA-1: a9435740046979888f2bf10cb5deae62b871ae49 SHA-256: 7cd32ab9c4f8e51918bf43e9de9434af71864baa314b3e1a403d6602529a61e2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, and includes a specific URL related to checking pandemic EBT balances, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving redirection to malicious sites or further exploitation.

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
  • 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.
  • 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://druttle.ru/strik?utm_term=check+pandemic+ebt+balance+indiana PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4401973/normal_5fecca4412dcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_6025cf66b6259.pdfIn PDF document text
    • https://cdn.sqhk.co/lanamixese/a9jhbih/xepixatumajukusuzonisuva.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/ihajd7K/dj_mixing_song_download_free.pdfIn PDF document text
    • https://pubogovivewata.weebly.com/uploads/1/3/2/3/132302724/satunefogirifulup.pdfIn PDF document text
    • https://genexezo.weebly.com/uploads/1/3/4/6/134616565/mulosajosade-kiduferupir-winona.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/dgc7I01/bollywood_dance_party_songs_2020.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/7292267.pdfIn PDF document text
    • https://cdn.sqhk.co/wumidimux/hfpjeji/word_stacks_level_1553.pdfIn PDF document text
    • https://gamubojuteno.weebly.com/uploads/1/3/5/2/135299935/vokinawabe.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/Gtihgfv/learn_to_sing_in_tune_app.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/h3igajb/cross_road_signs_images.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/aPRKigy/2415454239.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381735/normal_60029b06ddc6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_602bf8db1a247.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/zupenafud/27086874300.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/pdac_exhibitor_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/96532239282.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_off0000ec37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC37 5148 bytes
SHA-256: c5651b8a19a77fb2baa20168afd654b91683b5e2d7037de6ee31c902cc8175e7
font_01_sfnt_off0000fd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8C 11104 bytes
SHA-256: fbbe14b603507848a53192edd282c3c0e73de24d69898e1afec6ecd2271f66ac

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