Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc64b096fcd31af6…

MALICIOUS

PDF

73.0 KB Created: 2021-03-08 08:28:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 35a5afc2d81356a463e0a7b9217414d7 SHA-1: c8188d1cefdcd2f5c61aba1310afc98f497cb698 SHA-256: dc64b096fcd31af67d9afde18e59b9012ed8a10d1ebe3e26659cc51680a57d70
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 link farm, suggesting a malicious intent to redirect users. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs indicate a likely attempt to lead users to malicious sites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/123?utm_term=hayward+salt+cell+replacement PDF link annotation
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/kojumux.pdfIn PDF document text
    • https://jafusakivamo.weebly.com/uploads/1/3/0/7/130739280/bepezo.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/abstract_verbal_reasoning_skills.pdfIn PDF document text
    • https://nolopatemima.weebly.com/uploads/1/3/4/5/134583633/1838850.pdfIn PDF document text
    • https://rowegodidevonu.weebly.com/uploads/1/3/4/4/134468430/9358835.pdfIn PDF document text
    • https://vefoduwuwi.weebly.com/uploads/1/3/4/9/134902927/jobogelujadawuk.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/59d55.pdfIn PDF document text
    • https://sulipebi.weebly.com/uploads/1/3/0/7/130739254/3234364.pdfIn PDF document text
    • https://lirujisigibat.weebly.com/uploads/1/3/0/8/130874608/kewalonibeweroso.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/d703e0df-16e5-4364-b008-88de6c2f7ae5/xuwaxezonukapugifofe.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/84858490874.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/ghost_whisperer_episode_guide_season_5.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/64714213899.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/30917345595.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/85452203302.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/wudobudena.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/tusotifibodugawafup.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/immigration_officer_job_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/html_properties_and_values.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f1d7b3-4798-4c27-a83f-7b247e6b5ae2/14447664715.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/easyjet_brand_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb14ad6b-d276-45af-8b19-e54016ded3a3/kaziwagogikuxire.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/pirate_video_copilot.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_off0000df47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF47 5376 bytes
SHA-256: 40fa1ac01345d190308616fb9a97cb0844aa566666347f38a6c6f9a996647327
font_01_sfnt_off0000f18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 10808 bytes
SHA-256: a6a1ba74f0f392b8ac69a6474ccabeb58866b7e34a0a09517f957c91c9b131b2

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