Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e61d7a12450b57…

MALICIOUS

PDF

70.1 KB Created: 2021-06-01 10:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: af7b1780cd29e9c7cb2dff77e7663a12 SHA-1: 121a0120fe5d24d553de918c6372ada7e2274543 SHA-256: 24e61d7a12450b577fb59410043693118799e4ee3ed3efdfe879d1b0df397d12
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malicious redirection attempt, potentially leveraging embedded JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/123?utm_term=mapstruct+vs+modelmapper+performance PDF link annotation
    • https://defutijobazaso.weebly.com/uploads/1/3/4/5/134587482/xufitu.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4427094/normal_60b1aa4952792.pdfIn PDF document text
    • https://niwubeleligijoz.weebly.com/uploads/1/3/4/7/134764474/a0fda8422384.pdfIn PDF document text
    • https://nujunilotup.weebly.com/uploads/1/3/4/6/134642651/9b02e9cc8649.pdfIn PDF document text
    • https://mawijazug.weebly.com/uploads/1/3/1/3/131380733/fdcdc.pdfIn PDF document text
    • https://kiwewogulexir.weebly.com/uploads/1/3/4/3/134307720/wedudanem.pdfIn PDF document text
    • https://gepepokomireke.weebly.com/uploads/1/3/4/8/134892048/sufunarozovevegom.pdfIn PDF document text
    • https://fifejinokufo.weebly.com/uploads/1/3/4/8/134846395/vumozo_livipogaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_60677612dc62a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380863/normal_5fdfbb507a5b9.pdfIn PDF document text
    • https://fuvetozexogix.weebly.com/uploads/1/3/0/8/130874326/giguleke.pdfIn PDF document text
    • https://valiwuvubeke.weebly.com/uploads/1/3/4/6/134694219/5f174ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_602c2fd210aac.pdfIn PDF document text
    • https://lonopenofof.weebly.com/uploads/1/3/4/8/134895818/muxobozuwola-lajodefate-tigupite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_60269d0bc5861.pdfIn PDF document text
    • https://lemitixodage.weebly.com/uploads/1/3/4/8/134868200/xuwas_nibemebagafe.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/76dd391e-c8fc-41fe-9c41-22346e7aee71/big_little_lies_season_2_episode_4_stream_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2301a990-3989-4da4-8849-82e629b7cfc2/woods_wion_50054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a97bd623-a39b-4b90-9553-026682c9cb37/is_hermione_in_the_cursed_child.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca8a816-097c-4144-8bc6-e5807fb5a31c/73684273839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2955215-3fde-4d47-a9ac-4a1bc04075e5/rotubekojovili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c529301-3343-487b-9657-46f1e32af93b/stealth_camping_youtube.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_off0000d41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41D 5368 bytes
SHA-256: 18bca670663a78a58fa24ead0dce2aade8e3bd2b30ce3e38f6ca320bf60943c1
font_01_sfnt_off0000e65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65A 10728 bytes
SHA-256: 7c0273ba11e03815c2f5ba4c699cb89637a82cc21a78976b239da7d4250aae26