Malicious PDF — malware analysis report

Static analysis result for SHA-256 154dcac09da649f0…

MALICIOUS

PDF

69.4 KB Created: 2020-12-07 19:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: db966b51157f91a2cb18ce022f4207c6 SHA-1: ccae717160544835f1174b47a218a80a8c93bf6e SHA-256: 154dcac09da649f0dfb4e407c8a6e018cc3fb8da7eaec56e237181c60083909b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a URL related to Macbook repair costs, suggesting a lure for users. The PDF also includes a large number of external links, potentially for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?utm_term=macbook+screen+repair+cost+malaysia PDF link annotation
    • https://xowilululevala.weebly.com/uploads/1/3/4/0/134017879/6708299.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/gulapore/busenekemasojut.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0e5fd334513fae44511d/1606225503257/50466802205.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/definition_of_true_form_fossil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/addd80e4-88cf-4f79-a38f-18380cd50afe/19800777493.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfc3e2c6de34c7a38e337/1606220865283/mn_state_fair_map_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e30cd826-7965-4927-b64f-e49c07dde5cc/mewojuweb.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/useful_chrome_flags_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37be016f6d44b07cf02d7/t/5fcce5292bc7884852b4a766/1607263530746/security_camera_live_stream_app.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc006d0104edf1d777bfbd4/t/5fc138de7acac6192aed3726/1606498527203/90309101580.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/the_borderline_personality_disorder_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d19500-e16b-4702-ba8d-896b57dbb3d8/wmu_ece_4510.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_off0000d1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A9 5392 bytes
SHA-256: 14923c7d54b898a5519944681c44d515cef2f6f101ca615b489ee573e64f6f52
font_01_sfnt_off0000e3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FA 10712 bytes
SHA-256: c5daf8ad1afcdcfc92648311f1cb9b98025faa7f1efa69d3231b5fc86372cebc

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