Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf8d97d1044ca01…

MALICIOUS

PDF

69.7 KB Created: 2020-11-29 06:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 73deb96cf95a6fcea9c547a614937518 SHA-1: 1670edaab3144eb5d0b39bf4d06232561d431742 SHA-256: aaf8d97d1044ca01889aed3720a17a6734cacbcf38abe18400beb26fd59eab19
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or phishing lure. The document body is heavily obfuscated and unreadable, but the presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to external content, likely malicious.

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 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=the+factor+label+method+is+also+known+as PDF link annotation
    • https://sedifuwenute.weebly.com/uploads/1/3/4/4/134464273/f1609.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/5255906.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/c31d1841142065d.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/330649.pdfIn PDF document text
    • https://goraworozegisu.weebly.com/uploads/1/3/4/3/134324811/9390113.pdfIn PDF document text
    • https://tefufujilidawa.weebly.com/uploads/1/3/4/5/134578337/7324142.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://uploads.strikinglycdn.com/files/31592b8b-bbf6-41a9-87c8-14cdfa12af32/sefatovilewosuf.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/papowawuvunotoloxutejitaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57d69e5-9b34-425a-87e6-c4dcb4a4a61f/hp_pavilion_dv7_bluetooth_driver_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/peptide_bond_formation_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/icc_cricket_mobile_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/78797344499.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/byzantine_art_characteristics.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_off0000c534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC534 5296 bytes
SHA-256: 921f2537c5a839c55aba2c8e4bc022a3ff37efd4df1834bcfc3ee123b5d8e12d
font_01_sfnt_off0000d717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD717 11036 bytes
SHA-256: 12fc1e0d0ec0e0f29e02a27969778703b99327838a5ccd0451edbdcd32ccc62c
font_02_sfnt_off0000fc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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