Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a29b3e80b06eab…

MALICIOUS

PDF

69.0 KB Created: 2020-12-22 22:03:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b6beab89ba6a98cdf08a3622c7771f7f SHA-1: e8687fe529c289bcdd8129794fe1f8ebc607dff3 SHA-256: e4a29b3e80b06eab44b29079472ba5797f39582fb50236038a7c59e5bc06b63f
214 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a large external PDF link farm. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous external links, one of which points to a known malicious redirector, suggests an attempt to lure users to potentially harmful content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=best+lightsaber+replica In PDF document text
    • https://cdn-cms.f-static.net/uploads/4458631/normal_5fb041fbd0a3b.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/zejufediva-mijavevitarowe-rogukaxasuwomeg.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/nafoxuda/xolobalirodufitomazumiliw.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/meaning_of_jagged_little_pill_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/974af786-634a-4b4b-a035-2bd4db23ca77/15403764547.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/sheetz_garner_nc_27529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d72c00ee-e88b-4253-b4a6-92633ff22931/bixuzibafuka.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/14094003972.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/revelation_song_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/zozalapiranasorowabizosew.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/38238745076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1129975d-7507-46cd-9954-fce1c2ca8be6/fomebi.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/gerafobolazizebefewiwajof.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/24805203997.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_off0000d15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15B 5384 bytes
SHA-256: 6b6b3c1205105150a99ff793d4b1edff7028740e1a07ec6a37b111a803622423
font_01_sfnt_off0000e39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39D 10320 bytes
SHA-256: 07c60572c2702f254225151f5d4c0a75ca5ebbdaf08454123faeaba8f4e96873

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