Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6af4836936e4041…

MALICIOUS

PDF

95.8 KB Created: 2020-12-18 07:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1908c4f3ce77ca34c3c2e2af9e2c5557 SHA-1: 9d762e34b04ced5f16ab3b2a205382c6b427d374 SHA-256: e6af4836936e4041d49f5c20ab57bb0b3da75cf1f3ce36202bbf6e57690eb14a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffking.ru/strik?utm_term=alamo+bowl+ticket+exchange PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5fdc2eb18b32e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421477/normal_5fa4a17950d6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403143/normal_5fbb79a28d49f.pdfIn PDF document text
    • https://warenumew.weebly.com/uploads/1/3/4/8/134871813/bogatubolozuwago.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc4d5be12facd59cec62577/t/5fc7f1c1e08c080739ae2e23/1606939073832/neet_2020_answer_key_challenge_quora.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/12682415744.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc971c8c741314319700/t/5fc148644f983757200ed49a/1606502500611/jojigofat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc118153dfdd95b60d632f0/t/5fc81ba726a3037b432ea32a/1606949805130/castles_of_mad_king_ludwig.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc70e0a791da6493f683ef5/t/5fcb3742b6b7366152f527cf/1607153474641/juxamusojar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ae857d0c8f249d464d7c/t/5fc43a91eaf37e3b64229c03/1606695570241/larigodamozaneb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7ad0e81da8a590db20c77/t/5fceea7505f6f278074c1eb2/1607395959245/car_racing_2020_slope_climbs.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/seguridad_industrial_spa.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/chesterton_orthodoxy_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/jipamivejuziwumej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E36 5080 bytes
SHA-256: 9ff1c2244a87f5dc3f332cd54988fabf9a585d998f27b9ae022a485ddecfe23c
font_01_sfnt_off00013f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F70 10876 bytes
SHA-256: eddb0e8893caafcb1786d5b7d96fc95e1ba366cb0d470110531aec55ae62215f
font_02_sfnt_off00016422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16422 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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