Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a112e0bea29d09…

MALICIOUS

PDF

86.8 KB Created: 2021-06-04 06:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d25752850e146566c6f4d01545e4dc78 SHA-1: 2a547b561aba832db01b0d68f8530cc4b0620737 SHA-256: 36a112e0bea29d099ed8c9c89e5d23edb8f9c2c819e736f0f594508e7c8a012d
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=bal+hanuman+full+movies PDF link annotation
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/fcedd5.pdfIn PDF document text
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/dojado-titase-ginular-xolaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391319/normal_5feeb2ad99a25.pdfIn PDF document text
    • https://kiloroxo.weebly.com/uploads/1/3/0/8/130813762/panowax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489843/normal_600c23d4eb181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_600be21865d2c.pdfIn PDF document text
    • https://xuwajaxupix.weebly.com/uploads/1/3/1/4/131407635/zuguwe_letujamukiwin_mizubo.pdfIn PDF document text
    • https://magiriwumup.weebly.com/uploads/1/3/4/8/134866691/tarokopapanudokexet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477400/normal_5fe2a7979248a.pdfIn PDF document text
    • https://nigefidapeb.weebly.com/uploads/1/3/4/3/134385669/xaposoxixejufi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454808/normal_60097e37586d2.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/4d056cf1-f4b5-42ea-a7a1-741761195122/bamalumajefufetosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/156a54d4-9a8f-4313-bcdc-9face6ac3b90/xabokiwelibagilodowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32adcf6e-3742-49ef-ab80-8594b0d64cba/67708453304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d4aaceb-5a10-4269-9b64-553707ac4573/how_much_does_an_emergency_medicine_physician_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94518ed-a4e5-49d5-a38b-2ec6f49be6aa/notacion_cientifica_ejercicios_resueltos_fisica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcaf2dca-0db4-464c-b5b3-84ce5b8e2452/electro_hydraulic_brake_system_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de7ff74-fc67-4464-bb2f-a63038482826/medicare_benefit_policy_manual_chapter_7-_home_health_services.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546593d6-dc08-4424-b739-6638374af26b/larson_edwards_calculus_9th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48692221-0261-4c15-abf1-0c70617a544d/lipaxibokixonusate.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_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 10900 bytes
SHA-256: cacb8d94459f96bcfd1fe7c651e40169836c2a502be49c3c59a4ebde4239f3a6
font_01_sfnt_off00011640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11640 5020 bytes
SHA-256: df475ca8ef170eb82e0f5126ab40db5effb898718a28a9bd3ee267f155e4f8a0
font_02_sfnt_off00012735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12735 11320 bytes
SHA-256: a8add2c1124048da1e471fade1518f9312ad8871cd53ede82cadad7deb956329