Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbda4fc3857725d…

MALICIOUS

PDF

61.0 KB Created: 2020-11-19 04:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 462aee6f7bdb22a7d516fd5d0129d7e8 SHA-1: 79f97a6cef35cb9fed28180d28294ae8a3d15dfe SHA-256: 8fbda4fc3857725d70c83f6a115f2280b1a37e6cf32c51de2ece0eef7c0cee0f
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to installation manuals, suggesting a lure to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://gettraff.ru/123?utm_term=honeywell+th8110u1003+installation+manual In PDF document text
    • https://vogadebu.weebly.com/uploads/1/3/4/7/134723944/lokisupi-mimotimamov-diweladujuvotu.pdfIn PDF document text
    • https://zomusabizexeko.weebly.com/uploads/1/3/4/3/134317177/e2a662.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/miwem.pdfIn PDF document text
    • https://rirumuzog.weebly.com/uploads/1/3/4/1/134109041/33d1e460f99b9.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/1044171.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/junikuxadekojixojar.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/dalava/lemadeb.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/sotasopisovit.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/xobozabetorewutasi.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/medicine_man_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/lovowawen.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/spanish_to_english_translation_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/laporan_praktikum_titrasi_permanganometri.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_off0000b0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A8 5536 bytes
SHA-256: f3dfbdea8d367aacb0d9e694cb5270941bb11670dfd688ec48ce473290f1fb4e
font_01_sfnt_off0000c36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC36B 10560 bytes
SHA-256: 8d4d17d8fd0e4e6075ad8b3859b1dec79abea58cd51ee39dee2a495e26dc1e42

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