Malicious PDF — malware analysis report

Static analysis result for SHA-256 1179c32484e0a50b…

MALICIOUS

PDF

85.0 KB Created: 2021-05-31 11:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 45f484d77bdda5615715253414217254 SHA-1: 18cbc291fc496b4d5033fcf53c53cd8dbede6636 SHA-256: 1179c32484e0a50b4dbf27c5a7b95f47a1e135cc3d48c73debd31e42d67bb252
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains a link farm with numerous external URLs, including one pointing to fokemale.ru, suggesting an attempt to direct users to potentially harmful content. The presence of a 'download button' lure further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/123?utm_term=angry+neighbor++ios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394082/normal_600d323ebcbb3.pdfIn PDF document text
    • https://dasitonaz.weebly.com/uploads/1/3/4/3/134379343/nivituriw-jitineteniv-vixibujiwow.pdfIn PDF document text
    • https://nugesipepisi.weebly.com/uploads/1/3/4/0/134042061/tebil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_5fd3b443bf422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389101/normal_6067dfa5aaf96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499651/normal_5fcd965132229.pdfIn PDF document text
    • https://vajepagipe.weebly.com/uploads/1/3/4/0/134000011/feteza.pdfIn PDF document text
    • https://vimanofadubob.weebly.com/uploads/1/3/5/3/135304206/tugulib.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4420240/normal_60b3e61b3e0fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480904/normal_5ff429f1291b6.pdfIn PDF document text
    • https://pabimoju.weebly.com/uploads/1/3/3/9/133997489/tuvizapezopu_porumeligimud_nubakumisu.pdfIn PDF document text
    • https://zefipomez.weebly.com/uploads/1/3/4/8/134882075/78d68e8.pdfIn PDF document text
    • https://sojinunanujiwok.weebly.com/uploads/1/3/5/3/135311630/277e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418981/normal_5fe12718e196d.pdfIn PDF document text
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/lefututedufa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482854/normal_600885231b0bb.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/2e1ebfc9-766c-4333-8045-4eebb4ad174f/principles_of_geotechnical_engineering_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a625bc63-e083-4250-8256-5e9c0a688c3c/remington_electric_chainsaw_oil_tank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50cbe22b-e23b-4f05-b126-a58648428b2e/suzimemomudogad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/573519ee-681d-498d-8bd4-1082f504018a/why_do_i_see_cells_in_my_eyes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/835dd9de-5384-47ea-a9ca-0c26cf29e6e3/6694241530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b113cc02-bbb5-42bc-9440-b5275498ad11/los_nombres_que_significado_tienen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd216c4-1487-4d03-9a6e-19fe3cbe5cc2/rurudavojusoda.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_off00010fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB1 4936 bytes
SHA-256: 74e40f101f50055ddde2a06507a84e4ba81ea79039ef89a9dbb59f9ca4b403f0
font_01_sfnt_off00012085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12085 11104 bytes
SHA-256: 18ed51f1106c5e6d2827d4a9a74a189be9ed697dbc18564776c9b19b7eb8827b

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