Malicious PDF — malware analysis report

Static analysis result for SHA-256 645567d3f4f50181…

MALICIOUS

PDF

83.4 KB Created: 2021-04-13 00:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9faffaa8a85545f16045fd8b7a5b7e66 SHA-1: 51855114a4d47bcaaf998eec37f5c1676d91332c SHA-256: 645567d3f4f5018128c482176a9e835df7d2c70c53f660db1e251f1d907a7403
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users. One prominent URL, https://seumenha.ru/strik?utm_term=can+you+nap+in+dailies+contact+lenses, is identified as an SEO redirector, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=can+you+nap+in+dailies+contact+lenses PDF link annotation
    • http://negimemexib.iblogger.org/chiari_malformation_surgery_scars.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485569/normal_6027951e79466.pdfIn PDF document text
    • https://jowavuzawevubab.weebly.com/uploads/1/3/2/3/132303017/8087061.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/multimodal_biometric_system.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/94662902916.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/naligibarubuvopatejilim.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/android_10_for_note_8.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/wikurigamurugijufovovobat.pdfIn PDF document text
    • http://godisibipuvam.22web.org/atkins_and_depaula_physical_chemistry_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/what_is_biblical_perspective.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_605034d3e8f35.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/similar_triangles_test.pdfIn PDF document text
    • https://xowozasa.weebly.com/uploads/1/3/3/9/133999953/e6559395bd7aec9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_5fe8928da5d8b.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/dragon_age_asunder_free_download.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/xanulefaxojomalejosu.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/lost_books_of_the_bible_the_great_rejected_texts.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/patchwork_board_game_rules.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://popofisofol.myartsonline.com/88900092090.pdfIn PDF document text
    • http://bodagoge.epizy.com/default_judgement_high_court_template.pdfIn PDF document text
    • http://sikanuvigagefu.epizy.com/39396926468.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_off0000fb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5C 4980 bytes
SHA-256: 9540d4c663e03d4d6abe4bfc17d034c09dd664523a111e87e34b6efe69c5e6ef
font_01_sfnt_off00010c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C69 10496 bytes
SHA-256: 0048e5aefeb90e4a10bae693623f578a84c1ff175726078aaa6ce88ead3e349e
font_02_sfnt_off00013043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13043 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71