Malicious PDF — malware analysis report

Static analysis result for SHA-256 961b407533172d57…

MALICIOUS

PDF

132.1 KB Created: 2020-12-06 00:32:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2fec8ffb7a6750dda933820db0ebdc15 SHA-1: d2b6779a3095388d3f3240d832b50e7a0951d53b SHA-256: 961b407533172d5708c82938126acb2dc656a8743ad45f2416d42407b57a2cda
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF SEO link farm. One of the primary external links points to a URL that appears to be part of a phishing or malicious content distribution scheme. ClamAV also detected this file as a phishing trojan, further supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=indian+trail+high+school+honor+roll PDF link annotation
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/dikumasi.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/dulixise.pdfIn PDF document text
    • https://gupugeja.weebly.com/uploads/1/3/4/2/134235999/83d2f702799.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/8a68c5dc19.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/7805117.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc576fd8139af037663e8f6/t/5fc82c168bd7793567473238/1606954007298/skirball_hospice_medical_director.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/99020829540.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c273a13a450babf34cb7/t/5fc462ed9b1ed03538698eed/1606705901391/resveratrol_weight_loss_dr._oz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf556dae50a014586840a/1606219094611/thomas_train_table_instructions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd745bcb0228a2824d01/t/5fc352be9b1ed035384760a3/1606636224893/34724542709.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/mental_math_grade_1_worksheets.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64d6ab8467722f1f88a1e/t/5fc71f7ac7c45a5eafa0068f/1606885251307/human_resource_management_functions.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/motor_vehicle_tax_receipt.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CECE 5140 bytes
SHA-256: a050543f4fcfb1bcfa205e02b1c76e080643a4c05b94ce084edd456b7e23ec96
font_01_sfnt_off0001e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E03D 10732 bytes
SHA-256: c33d022f85b4d531bd1ecde1d6858b54845114e93b240b5ce05c5d6e216b6f75

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