Malicious PDF — malware analysis report

Static analysis result for SHA-256 9566922e00a3d443…

MALICIOUS

PDF

64.1 KB Created: 2021-01-26 10:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4280d5d873ca74b005513da5f64d032c SHA-1: 95c7a2d90c4ed0d7cbbb6f62626940218360abb2 SHA-256: 9566922e00a3d443411c179985f67fe1c0bce881d8821ee222203701ffc57f05
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though partially corrupted, appears to be a lure related to thermostat troubleshooting, likely to mask the malicious intent of the embedded URLs.

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://crophysi.ru/123?utm_term=honeywell+thermostat+th4110d1007+troubleshooting PDF link annotation
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/jebaso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465396/normal_5fe764597e6aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465252/normal_5ffcfe8bca80e.pdfIn PDF document text
    • https://nobaloledajasom.weebly.com/uploads/1/3/2/6/132681012/16ffa3a.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/IghhHHu/new_york_city_sightseeing_hop_on_hop_off.pdfIn PDF document text
    • https://rovisudaguxu.weebly.com/uploads/1/3/1/4/131438800/128a437632d03.pdfIn PDF document text
    • https://wiguvizokon.weebly.com/uploads/1/3/0/7/130776253/8f706dedc1.pdfIn PDF document text
    • https://rupubonu.weebly.com/uploads/1/3/0/7/130739332/3668334.pdfIn PDF document text
    • https://marevesebogu.weebly.com/uploads/1/3/0/8/130813877/gilunawaxokogezamoko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380536/normal_5ff56adc9c189.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413111/normal_5ffebaab97fbf.pdfIn PDF document text
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/bunoxazaxexalevefoga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370068/normal_5ff383c016f4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498392/normal_5fd8adb64d194.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/176b414d83e95c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365570/normal_5fefdece69f3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_600dcff262c21.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/wavunot/def_model_answer.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_off0000bf74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF74 5896 bytes
SHA-256: fb652a0d264f361639bfcf18d57f80cc46bfd6d9261ec13d2dc43e50253dedb0
font_01_sfnt_off0000d378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD378 9240 bytes
SHA-256: 5ba4932c52d21ff60f1649b4cd7d97714c5a47a5d7a6133dd1813c89d679fe7c

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