Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84f2e95ead63aed…

MALICIOUS

PDF

70.5 KB Created: 2021-03-15 20:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 13436089ed0ed0341cafc696df8511de SHA-1: fa82d8737e14f4cbc8700407f5abf9bcd467d0de SHA-256: f84f2e95ead63aed23cc8248371702d28ae26781ce739eff5b51e4ae9a6e5edf
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, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs, such as 'https://ponafet.ru/strik?utm_term=change+gonna+come+lyrics+mike+yung', are used as lures to direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=change+gonna+come+lyrics+mike+yung PDF link annotation
    • http://podarokinsta.online/uefa_champions_league_match_attax_2019_20_topps78kka.pdfIn PDF document text
    • https://ribosotegolexo.weebly.com/uploads/1/3/4/0/134013239/629a720612a59.pdfIn PDF document text
    • http://fortuneo.biz/sefoxevevulenipiwomifm2a97.pdfIn PDF document text
    • https://zalivibutadugaf.weebly.com/uploads/1/3/5/3/135391941/5500811.pdfIn PDF document text
    • https://zekenegelu.weebly.com/uploads/1/3/4/3/134390475/d42dae611.pdfIn PDF document text
    • http://inertbhjbj.ru/where_is_pressure_switch_on_carrier_furnaceyaicf.pdfIn PDF document text
    • https://wolofineso.weebly.com/uploads/1/3/4/5/134598063/jazevov.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/wumekokovafid.pdfIn PDF document text
    • http://urro-hu.com/36514460853ohi7l.pdfIn PDF document text
    • http://pitushok.fun/nutrition_store_near_me_herbalifej7fb9.pdfIn PDF document text
    • https://gosasolana.weebly.com/uploads/1/3/4/5/134523876/fawazito.pdfIn PDF document text
    • http://boost-shop.xyz/kevufuregakwzs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_3829b73ed89947f1bc76e1bc47306479.pdf?index=trueIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_00072e6c505144d3922564787b69a3cf.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_1867694181df467eb1633e8cc08ca1c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a2ecf4-08b0-465a-b1fb-379d597804fc/6147763112.pdfIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_e7a42991023143eeb7dcc60ed4686c18.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e558e5-27de-48c5-bd7b-b2bae67610e9/2012_ford_f350_owners_manual.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_off0000d4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A3 5284 bytes
SHA-256: 4fe62b75f70fcd402b3888fb3a0343cdf74cae1aa496c5ef26a4d7bce7185295
font_01_sfnt_off0000e675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE675 11380 bytes
SHA-256: 2b761d782916abc607f6e4b5bc30ae3aacb42390ffca312362d77f46955ace56

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