Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96045374ca87f70…

MALICIOUS

PDF

73.0 KB Created: 2021-02-20 17:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b7f3b2d2bebb9e2d6a534b17ae9073a6 SHA-1: d95856a3a4046b3d24fdcf27d63c53bb31395808 SHA-256: b96045374ca87f7056908fde26b6f121f7a509e379be542be287f1ef28c07441
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily corrupted, appears to reference printer troubleshooting, a common lure for technical support scams or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=canon+mp830+printer+troubleshooting PDF link annotation
    • https://juvetobewuneted.weebly.com/uploads/1/3/3/9/133997509/7056393.pdfIn PDF document text
    • https://cdn.sqhk.co/sufipuxifemo/jciiiaX/wavepad_audio_editor_free_apk.pdfIn PDF document text
    • http://knitfqph.site/14166116990ngozs.pdfIn PDF document text
    • https://cdn.sqhk.co/zebapomiz/7hbGl8Y/talking_ginger_online_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425514/normal_6009af15382ed.pdfIn PDF document text
    • http://themarkuzmusic.com/ferasifatrtukm.pdfIn PDF document text
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/zepapepelasim.pdfIn PDF document text
    • http://reduslimitaly-official.website/toca_life_neighbourhood_secretsxggfq.pdfIn PDF document text
    • https://waxajevigeko.weebly.com/uploads/1/3/1/4/131453715/lutiroxosine-kumif-vufamikedid-rapibixoxumolax.pdfIn PDF document text
    • http://winoorama.site/pinekrdksk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pisik/26541617357.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/48698938847.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/solving_equations_worksheet_doc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A9 5776 bytes
SHA-256: 9f26b806e582c6bd8d74e1ed553b2d6a1d31d4e561c4359de795ba7bea6a0192
font_01_sfnt_off0000e51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51A 10600 bytes
SHA-256: f0bec7d933bcf710d52d091f3d7f43bb12d99f5a11a53ab52f574c5dc404ed07
font_02_sfnt_off0001095f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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