Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bc4aa656dcb30e…

MALICIOUS

PDF

76.3 KB Created: 2020-12-19 14:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 67933e1d6f061c8d52057dc2c0e6dc84 SHA-1: b32bed671bac79ee1ccda1c5608965b29acc8315 SHA-256: 69bc4aa656dcb30e52c2fb3579e29ba50bd43a8d9c7f6f43bd182492702fa0be
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The embedded content, though heavily obfuscated, appears to be a lure for a Honeywell humidifier manual, directing users to malicious URLs. ClamAV and ML classifiers strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffine.ru/aws?utm_term=honeywell+humidifier+hwm705wcd1+manual PDF link annotation
    • https://duxepanakotijek.weebly.com/uploads/1/3/4/3/134340233/13eb87.pdfIn PDF document text
    • https://zogerosolubelu.weebly.com/uploads/1/3/4/5/134576434/6108633.pdfIn PDF document text
    • https://gukenefekofuga.weebly.com/uploads/1/3/4/5/134588358/xurazofesogesozef.pdfIn PDF document text
    • https://rigawegafo.weebly.com/uploads/1/3/4/5/134587157/1854684.pdfIn PDF document text
    • https://sutisivanopazar.weebly.com/uploads/1/3/4/3/134310164/puwaresabunoz.pdfIn PDF document text
    • https://vawuzusafut.weebly.com/uploads/1/3/4/8/134863851/zigekedifu-nimozufasolasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5f89b91e55290.pdfIn PDF document text
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/96f8a.pdfIn PDF document text
    • https://bajewenizuku.weebly.com/uploads/1/3/4/4/134475359/disunetate_wibipaxut_bovugekad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ec388f-262c-48e7-aa7f-21f491c58eb4/24_hours_of_daytona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f4ec5e-926d-404a-b306-800738543373/someone_named_eva_book.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_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 5636 bytes
SHA-256: 6aac7f96bf2789dfb3af56d17d1120e2a857db689d1c5e4b492bf0d3f4304b62
font_01_sfnt_off0000fe91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE91 11492 bytes
SHA-256: 76553af3485171335b63adc4469e995457ac29520a9093e526180ab5fa9beb50

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