Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d3c4002e844374…

MALICIOUS

PDF

76.4 KB Created: 2021-04-17 00:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8743d72f7daee8e7c60fbc9d55813c62 SHA-1: e174c53da0e8a49ba74a05c538b94b6a4c61eac7 SHA-256: 09d3c4002e84437428de18666a3bd1a74b8216668824dfa113612dbc038a37a3
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to an SEO redirector designed for phishing or malware distribution. The primary lure appears to be a guide on setting a watch alarm, but the embedded URL leads to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/strik?utm_term=how+to+set+alarm+in+skmei+sports+watch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469135/normal_601bab7aabdbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488804/normal_605d74c1877c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479933/normal_600cc892dd57e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_604f4b6c44f13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386089/normal_5ff96be8e5855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_600bcc6420ab7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385415/normal_5ff0b0b88e995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_604a4f5c7b668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_606ad5434176f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_81c9bd8434714e428a9fe98b04d09d80.pdf?index=trueIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_56de1cf4d04c4aeb9baba6760a2fb2d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1536397f-21bc-4f3d-8eb3-97af1c902e7a/mobizen_screen_recorder_internal_audio_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6104a771-c727-44d9-a049-600ddfa380b1/reflexive_verb_examples_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/409d9270-6921-4135-933a-5c958960762d/76143263250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3732cc72-0c9e-496f-a964-fa775847a780/54713369127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f32d191-3d06-456a-8dc4-b548701b578c/pemamega.pdfIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_99c7b03ff8f84838bc52be6405a08815.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/724daa30-4a25-431b-baff-93f83f405d97/line_6_firehawk_fx_pedal.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_off0000e412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE412 5292 bytes
SHA-256: 7650a75f9135f6e5a3399a8a1eaaa166119d634bb8e2d550a14c1b37e56e271e
font_01_sfnt_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 2048 bytes
SHA-256: ac563f1180543c9f4d9b102108afa0e0941b2fd4f199aa08af3cddd05ca1801a
font_02_sfnt_off0000fec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 11020 bytes
SHA-256: 83580e461b0a3820e1095aa794e08c84997daaaa9c3b84dd34805bf566619cb4