Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc2ebdf7c1998df…

MALICIOUS

PDF

81.0 KB Created: 2021-03-16 22:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1accc99d5ceb71752d170b132003d59d SHA-1: 42f617e52c6d4773db522a5881a2835e4a219e52 SHA-256: 6bc2ebdf7c1998df7d23d72a613d1329298a8d483fe92823395c505375311624
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent example being https://seumenha.ru/wix?keyword=the+skin+im+in+desmond+cole+pdf. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, suggesting a phishing or malware distribution scheme. Although no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=the+skin+im+in+desmond+cole+pdf PDF link annotation
    • http://uscovidcharts.com/widenemifejimomumobih0b2.pdfIn PDF document text
    • http://ygrash.website/46976521590v53t4.pdfIn PDF document text
    • http://rejamar.sportsontheweb.net/jarazot.pdfIn PDF document text
    • http://goldstein.berlin/what_do_numbers_mean_spirituallyi0jge.pdfIn PDF document text
    • http://wersita.fun/85978824076b2ev.pdfIn PDF document text
    • http://tujubiluwanodof.22web.org/87336325230.pdfIn PDF document text
    • http://kogejirupu.getenjoyment.net/cambridge_young_learners_english_tests_movers.pdfIn PDF document text
    • http://openlait.pro/90472674371k7ge4.pdfIn PDF document text
    • http://dezlice.ru/pro_p90x_fitness_programfi7ss.pdfIn PDF document text
    • http://esclub.pro/dedabobolulonosujevenuguteyqg.pdfIn PDF document text
    • http://rukozhop-guide.com/tap_tap_dash_apkoga0b.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/38162416276.pdfIn PDF document text
    • http://makamar.xyz/vapepjk7co.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://tizeruxabono.onlinewebshop.net/best_biceps_workout.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/cancer_star_information_in_urdu.pdfIn PDF document text
    • http://sarirepenibe.epizy.com/toriwojopowuwinige.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/42123447103.pdfIn PDF document text
    • http://matixonapoler.epizy.com/rudram_meaning.pdfIn PDF document text
    • http://fofanab.epizy.com/can_sex_cause_bleeding_and_cramping_during_pregnancy.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/48509683131.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_off0000f2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AF 4812 bytes
SHA-256: 6c107a1eb876ffcf36b02b063d8583b7cfbb96b5a91dd4a796c3a8285a1405da
font_01_sfnt_off000102cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CC 11168 bytes
SHA-256: 394028d8d75bbb702dabfd53c7a572788eac3b20c549835b16bd06cef6814846
font_02_sfnt_off00012859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12859 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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