Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7567f08c329ebd…

MALICIOUS

PDF

90.7 KB Created: 2021-02-28 03:28:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: afd20f96652b11f973657e9ebf9d2f63 SHA-1: 29147389b763841b9e32f4afc20f60bed0c95473 SHA-256: 6c7567f08c329ebdf21dfb89c926833260d9c86d10411ada10ebc895dbcb0684
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://lozipotod.ru/wix?keyword=lesson+14+equivalent+linear+expressions+page+143+answer+key PDF link annotation
    • https://cdn.sqhk.co/vibisidumes/hphczlg/near_earth_asteroids_2019_video.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426675/normal_60032af239ddd.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/rupenenezovedajezigu.pdfIn PDF document text
    • https://cdn.sqhk.co/pegiridireva/d8gd05r/making_smash_burgers_on_griddle.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/chbhtvV/within_movie_2016_david.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/3697319.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/BhjiBpn/kokugi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407813/normal_5feca010b328a.pdfIn PDF document text
    • https://wudowured.weebly.com/uploads/1/3/0/8/130873715/muxel.pdfIn PDF document text
    • http://golixudib.mypressonline.com/2011_maserati_granturismo_convertible_price.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://s3.amazonaws.com/pirofopafu/facebook_sdk_unity_android.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/is_cards_against_humanity_online.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/33089002325.pdfIn PDF document text
    • http://pigutun.myartsonline.com/bella_single_serve_coffee_maker_parts.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_off0001163d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163D 5628 bytes
SHA-256: e6e3d37d094bedf1234dce5724a6adf04e77a6e541ff262286e4c09506a0466d
font_01_sfnt_off000129a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A3 10988 bytes
SHA-256: 7082db1c9f96045c380de1cf739f4935c27ace25c94da76f0e65e807363fbf06
font_02_sfnt_off00014ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE7 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.