Malicious PDF — malware analysis report

Static analysis result for SHA-256 586e75633e56a20a…

MALICIOUS

PDF

86.2 KB Created: 2021-05-27 08:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 656e5ce8aa18e14397be32a480a4ba1c SHA-1: d8a838eab508fcae89de571b0c293847d330179a SHA-256: 586e75633e56a20a532cd6637f5408f1b122f1ba9cfd987398d862c58fb3ce54
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services and are designed to appear as SEO-optimized content. The primary URL suggests a lure to download a game, likely a phishing or scam attempt. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=descargar+dragon+ball+z+tag+team+para+ppsspp+con+mods PDF link annotation
    • https://vokufasel.weebly.com/uploads/1/3/4/8/134872836/mizisiporavi.pdfIn PDF document text
    • https://neninilez.weebly.com/uploads/1/3/3/9/133986457/4523991.pdfIn PDF document text
    • https://koxabiniz.weebly.com/uploads/1/3/5/9/135994092/lajamajazutafusizit.pdfIn PDF document text
    • https://tizupokewa.weebly.com/uploads/1/3/4/0/134013062/92e888f2ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388842/normal_5fe4c367adf86.pdfIn PDF document text
    • https://mokoxofedig.weebly.com/uploads/1/3/4/8/134891763/kelamobideku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460066/normal_603105a77877c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5fe88f637eb17.pdfIn PDF document text
    • https://felixitu.weebly.com/uploads/1/3/4/0/134012625/domabufuzofijuwe.pdfIn PDF document text
    • https://gojenegitoz.weebly.com/uploads/1/3/4/3/134387591/225366.pdfIn PDF document text
    • https://lusizemanu.weebly.com/uploads/1/3/4/1/134108609/5019905.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/363857d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476751/normal_5ffd442ec4f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408583/normal_5fe6364c1372a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_6041dbf9a9ac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_6052fe440e3c5.pdfIn PDF document text
    • https://xarupome.weebly.com/uploads/1/3/4/4/134469096/rodusox.pdfIn PDF document text
    • https://pegepigav.weebly.com/uploads/1/3/4/4/134481067/luwujodiso.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/8583d382-a4c9-4d16-8e01-e6b3f97b7bf7/jiwenej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a438e153-a621-4502-84ff-5aa9509fd5a8/washing_machine_f2_error.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/426819e9-e926-4d2a-b8ed-859a1fb6afaf/how_much_to_have_a_stall_at_spitalfields_market.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6543f5-7a48-4972-ac7d-bf00502302a1/where_she_went_book_kelly_simmons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d64daa4-29b8-497b-9e7d-66697a5f4c7c/cant_stop_wont_stop_lyrics_rhcp.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98A 5580 bytes
SHA-256: dd89da105b7bb9c873df1fc3537399f068ace9082103954c74802c85d0c460ef
font_01_sfnt_off00010c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C74 12120 bytes
SHA-256: 6d9c4cc6f2368de001a199c1f9f74fa45d1f8802ed2a130a72de6f1e17009b67
font_02_sfnt_off00013421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13421 16068 bytes
SHA-256: 3b1167557c0500c78008053c404847a906c4d495ef15adec583fc97e76626070