Malicious PDF — malware analysis report

Static analysis result for SHA-256 0faa7f8f153657a7…

MALICIOUS

PDF

71.7 KB Created: 2020-11-19 17:56:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9c6e8cd78079dfe00452b534ce748d8e SHA-1: d7f1ad3894ba2ba968c428bde9e712c512d65755 SHA-256: 0faa7f8f153657a7fa73bd0d0b3b113f8e027c3896ddb9e858441e8baa16907d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://trafffe.ru/123?utm_term=retaining+wall+design+pdf+as+per+is+code PDF link annotation
    • https://gamorajemusuro.weebly.com/uploads/1/3/4/3/134316050/4984318.pdfIn PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/4117077.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/xawepalaba_zixajenusilad.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/6612789.pdfIn PDF document text
    • https://dadekojulaza.weebly.com/uploads/1/3/4/3/134320805/2241425.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/jubujanaruz.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/a123d7d1-ba9a-4de1-87b3-5d09a5d002f4/funolilanototitemol.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/yoga_poses_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed736832-4cdb-46ed-92cd-5b9e90e30103/compendium_of_acrylic_painting_techn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c74a3cb7-6dfa-4407-9105-3f6bc61efa09/karate_stance_vs_boxing_stance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f03206-9d1b-4901-98ec-19a44bad496e/midulafaritekuseluxozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f54287-a09e-48c6-9984-a35b5d7f8b98/najorutoz.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/vumapedinaxipogiguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c039e8b-9b59-4ab4-aa6a-82882aff8bba/faketobufeb.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/semogididu.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/lumitizubukipiwax.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_off0000dd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4E 5424 bytes
SHA-256: aea34b5d9026f32090e4b711fa142472c7f8a0d64815fa1c048968560a7da075
font_01_sfnt_off0000efe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 9948 bytes
SHA-256: bdb1e4c2fca40c14099db147db29fc5631060daf9f3cc0e42e75cac81e363814

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