Malicious PDF — malware analysis report

Static analysis result for SHA-256 d91fa54b9312413c…

MALICIOUS

PDF

67.7 KB Created: 2020-11-13 02:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e612719ebe91399a2aa0c7107ae1a8e3 SHA-1: 95c5add24f95f4b597bf16696baf2623a698cad0 SHA-256: d91fa54b9312413c298cfa702ecd9c04693242057a97de1daa94474c892e2f07
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://trafftec.ru/123?utm_term=tango+tek+villager+mod+playlist PDF link annotation
    • https://mitegasur.weebly.com/uploads/1/3/1/8/131871816/wubagomotepiwapi.pdfIn PDF document text
    • https://tufobedix.weebly.com/uploads/1/3/4/4/134431979/0094d43b7.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://uploads.strikinglycdn.com/files/c12f0455-eaef-41a9-b8a4-9217c6d7f1cb/povojulatapimepogij.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/xadomewizufureloginir.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/vivaldi_summer_presto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dfd0e2c-afb3-43a1-a655-a5dcd490edfe/61308561470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1e61e5d-ab11-4f03-91a5-83c635ed5700/dikiwolavoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fbf37a-148a-4e45-a859-fc3f887938d5/jennifer_eagan_channel_7_age.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/9036968531.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/pdf_to_word_convert_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b8cfa2d-0444-453a-a3ca-b68df2d7d5b0/mirulizewukatixokit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5b4f14-e62c-4515-8d94-3e0bf72cc88c/xosixopezodedaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/984d8e10-0d38-479f-b50b-cb2bd046b6d9/american_imperialism_political_cartoons.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_off0000bdf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF6 5240 bytes
SHA-256: 289feaadfc4203b12192d20efe42ac90024d7ac26aa21acb0aac2d4a5cd454f9
font_01_sfnt_off0000cfbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBC 10656 bytes
SHA-256: 678afb700b691e37ce5f949f52af0d47e7729f4b8af8f1f5c1eb6b8753a540a1
font_02_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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