Malicious PDF — malware analysis report

Static analysis result for SHA-256 318b29856cc25cfd…

MALICIOUS

PDF

80.3 KB Created: 2021-03-28 05:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d292eceea289eda225bdb3f1b59ba803 SHA-1: 2b0a99c7c425af5d2e4b9332470f8ff952f85d88 SHA-256: 318b29856cc25cfd80a7c3a64fca6aca3a668eb3fe723f7c8656385ade9ec5a8
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'SE_CALLBACK_LURE' heuristic indicates the document may prompt users to call a number, consistent with tech-support scams or callback phishing. No scripts were extracted, but the presence of numerous external URLs points to a likely attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/123?utm_term=neet+2020+form+apply PDF link annotation
    • http://fezivexem.iblogger.org/modivuxaxinutajatawip.pdfIn PDF document text
    • https://sazavilekin.weebly.com/uploads/1/3/4/8/134851962/lelutemavafulupe.pdfIn PDF document text
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/c4b68a98f5491f.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/294989.pdfIn PDF document text
    • http://josebixotarez.22web.org/tolotisuzolulokiz.pdfIn PDF document text
    • https://lejonelawubuw.weebly.com/uploads/1/3/1/4/131453657/nofuxemerabaloj_kujosokekuxafen_tibidu_nosap.pdfIn PDF document text
    • https://xonajuximo.weebly.com/uploads/1/3/5/3/135311854/8e5f6.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/gudukupir/consumer_reporting_agency_cra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a9f182-b9fe-43b1-b687-f4b8de623c8f/23036053484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b4891c-6b8c-4999-8220-09043a61da21/mutajejibaluxiwifobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeef7891-ede3-4a60-9fab-081c7b9c9061/3115132384.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/vosexagugapazemovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd9c5c4-84c3-4dbd-b11e-b71f6c26c612/que_hace_un_mecanico_de_autos.pdfIn PDF document text
    • http://rebefagor.epizy.com/acis_and_galatea_handel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762e7cfb-607e-43b3-a616-3fc834b07ae9/42831012097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8477d4-44b7-4453-b5a3-abb5f6967bec/system_software_engineer_salary_malaysia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4452f262-712a-41de-8851-1943d616483b/answers_adams_calculus_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/pokuxinubakovenibomuz.pdfIn PDF document text
    • http://wewozewifepono.epizy.com/tudo_sobre_o_cerebro_humano.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_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 5212 bytes
SHA-256: 5c734178a9d71f21c135150a5b6d5cbcbbab793e06b182b0755327d8fce5d69b
font_01_sfnt_off00010c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1C 11372 bytes
SHA-256: b18aed0f74246abd1e6ab7e03414b353de7cb1fc8ab6584f17a07a9ec77a5df6