Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39fa1cfbcddf19a…

MALICIOUS

PDF

66.7 KB Created: 2020-12-24 12:32:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9f5defc00c7441d82ca995deb570505c SHA-1: 97a9c6bdd9c4cd4fd007b03437ee98d83da93314 SHA-256: e39fa1cfbcddf19aaf224d8ab8a1439a706fc844495b854221f794b33df68f13
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate malicious content. The primary malicious URL identified is trafftec.ru, which is likely used to redirect users to further malicious content or phishing pages.

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/aws?utm_term=d%2526+d+monsters+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/netesatova/PdgjzgF/scary_shark_simulator_2020_shark_games.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/jiwjj5m/84790837382.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/jYoighJ/nasuguxizili.pdfIn PDF document text
    • https://cdn.sqhk.co/xubenijevewe/Mggig69/19684772491.pdfIn PDF document text
    • https://cdn.sqhk.co/rapavuse/BdjgjjS/download_game_cartoon_war_gunner_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xowuzaseku/IZb2hhi/69591832009.pdfIn PDF document text
    • https://cdn.sqhk.co/xakatikakizi/T7jbx78/16512347832.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/4774448.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/tesapibebujep/benefits_of_intensive_reading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c871d6-62b2-4f40-87f0-cf1db2dcf60f/72911623270.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/different_android_models_dbh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f94f43-94f1-4a1e-a583-2a28da65293d/58994234577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbdcf9d6-8a37-4d32-bf88-c9bb870a47e6/dream_savior_gakuen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eafc594a-e25f-4ebf-9ed3-8e1c3d59eebc/liwan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9d4114-d224-4cb7-85a0-3258cea9c4b5/72408531099.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_off0000cc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC91 4156 bytes
SHA-256: 7b9a78bc71d00e4bcff8473d51fc82c270a18144a13d22e5cfd906eda86eaada
font_01_sfnt_off0000dabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABF 10668 bytes
SHA-256: 0f0169000c9317d9fb66233074ec1207f44113cbf49acabb6fdeb914cd63924f

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