Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74f696e1f568388…

MALICIOUS

PDF

68.8 KB Created: 2021-03-30 07:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 90bd94adc0b7dd4e0dfea1bdc3b3babd SHA-1: 54b093db496da7ab18e043980ee5cdab5e902314 SHA-256: a74f696e1f5683888d63908d439da413a02462c1191d90ff61bfd727077e1b75
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicative of a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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.
  • 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://botokaw.ru/wix?keyword=garmin+golf+watch+manual PDF link annotation
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/a0d5835686d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369308/normal_5ffbd7d9e35d8.pdfIn PDF document text
    • http://fruit-citrus.space/punjabi_movie_ardaas_karaan_in_hdk05ps.pdfIn PDF document text
    • https://suxokigivulumu.weebly.com/uploads/1/3/4/4/134479742/9ea66d.pdfIn PDF document text
    • https://waniritapi.weebly.com/uploads/1/3/0/7/130739375/2218922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379471/normal_5fc8d03f87f04.pdfIn PDF document text
    • https://saselafe.weebly.com/uploads/1/3/4/8/134894966/1243030.pdfIn PDF document text
    • http://jukavoluv.iblogger.org/fenufe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389823/normal_6006abb6428cc.pdfIn PDF document text
    • http://healthyforczechrepublic.site/oca_oracle_database_11g_sql_fundamentals_i_exam_guidepu3n0.pdfIn PDF document text
    • http://runatem.66ghz.com/63864504666.pdfIn PDF document text
    • https://newomuzupigew.weebly.com/uploads/1/3/4/4/134468212/9949804.pdfIn PDF document text
    • http://manudagubik.22web.org/world_war_z_movie_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nifojasavolu.rf.gd/traxxas_summit_1_16_parts_diagram.pdfIn PDF document text
    • http://sofikej.rf.gd/48358498722.pdfIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_def655fbdf1a44efb054d9419c03966f.pdf?index=trueIn PDF document text
    • http://zujoragog.epizy.com/96209575655.pdfIn PDF document text
    • http://reluwiz.epizy.com/creative_brief_examples.pdfIn PDF document text
    • http://tujajolurasa.rf.gd/febrile_neutropenia_guidelines_nccn.pdfIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_1ceeca79967644ac839116c44889c93c.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_df16a0cadc7a4e388d99a710c9383078.pdf?index=trueIn PDF document text
    • http://jusudab.epizy.com/maa_durga_ka_bhakti_gana.pdfIn PDF document text
    • http://xupimegoroze.epizy.com/how_to_apply_a_large_self_adhesive_vinyl_sticker.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_off0000d28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28B 5240 bytes
SHA-256: edc5a9cb7e3af89d12866e831b686fa246acdc8f34cb3ef730c12769a9a6a960
font_01_sfnt_off0000e44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 9872 bytes
SHA-256: daf20f8378de328f3129edddb92e01a7bd4d79df8c4bc48e709cc5d8ab62d203