Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc2342f159da03e…

MALICIOUS

PDF

88.2 KB Created: 2021-03-10 02:32:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83cfafe92a132a8595b6944c66284b66 SHA-1: 7ff89c372aa462c0b469ad0cbb829764dcca9ee2 SHA-256: edc2342f159da03e617713c3108c54079618515d032dd7f50db6dcd4ac9b12fd
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to domains associated with link farms or potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to a network of sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=animal+sounds+list+in+english+pdf
    • https://cdn.sqhk.co/nugopanage/hatiaha/lijukopelakidibodugodag.pdf
    • https://static.s123-cdn-static.com/uploads/4450428/normal_5ff8de6579a4e.pdf
    • https://static.s123-cdn-static.com/uploads/4386622/normal_6001c44f7f7da.pdf
    • https://cdn.sqhk.co/baruduwege/ijcifXr/xazubamitiretawufimozuf.pdf
    • http://labiosdewonda.com/14145532029iuoob.pdf
    • https://cdn.sqhk.co/wumidimux/hbKhfUK/menadivukonaxenawodupu.pdf
    • https://cdn.sqhk.co/boxokozofe/ejf7Yhb/levimux.pdf
    • https://cdn.sqhk.co/dafisuwikib/w6gjhcr/22449801302.pdf
    • https://cdn.sqhk.co/bawevabob/hdggjcN/skulduggery_pleasant_quotes.pdf
    • https://cdn.sqhk.co/sedazozesufu/cWjchaK/encyclopedia_chess_combinations_vol._2_informants.pdf
    • http://regse.website/bses_yamuna_duplicate_billotvsq.pdf
    • https://cdn.sqhk.co/safubuguva/cM2TBDn/christmas_cross_stitch_table_runner_kits.pdf
    • https://cdn.sqhk.co/livefivepa/xggDheR/deloitte_asc_842_lease_guide.pdf
    • https://cdn.sqhk.co/xexogataza/gejdjaU/81524186961.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/golepe/29379883840.pdf
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_41a3999a077142d0a96cc9cfa6e527d8.pdf?index=true
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_55b97a81c6384e7897c165104b1f69ad.pdf?index=true
    • https://s3.amazonaws.com/sixenogafopoj/mi_a2_lite_actualizara_a_android_10.pdf
    • https://s3.amazonaws.com/vovuzize/mhf4u_trig_identities_formula_sheet.pdf
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_57848c0677c04fe28b925cc60515c8cd.pdf?index=true
    • https://s3.amazonaws.com/kewuxejikiwe/domestic_disturbance_police_report.pdf
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_2015752926c84871a46bfe7cf7048eaa.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010532.bin
8b8c81520269bb4628297d25bc2b8293011f7975b9212c6f2f0ec4d9c15a5458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 5232 bytes
font_01_sfnt_off000116ca.bin
60798947287d1b9b29c47eb99118220df7f3277240a445f5c3817a5abf228ec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116CA 14764 bytes
font_02_sfnt_off00014518.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14518 4324 bytes

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