Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e10a804453f8411…

MALICIOUS

PDF

100.6 KB Created: 2021-03-28 16:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eac3c617af80ecf255c60bcacbf8d7c SHA-1: 5fc9b445b9cdca9d8c078f3f290ec6da0b351a8f SHA-256: 7e10a804453f84116bc03bb2833024866cc081b2a066333309506c95fa2401fb
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It contains numerous external links, with one prominent link pointing to 'gimoguvi.ru', suggesting a link farm or redirection to malicious content. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=buddhism+vs+hinduism+reddit
    • https://static.s123-cdn-static.com/uploads/4466364/normal_5ff30dd0c62a4.pdf
    • https://cdn.sqhk.co/wanevakaxuma/gjiawjf/dedutidukusafika.pdf
    • http://instup.xyz/tracfone_lg_k31_rebel_phonee7eh2.pdf
    • http://stankovit.ru/mini_dapple_dachshund_puppies_for_sale_in_illinoist5155.pdf
    • http://erse.xyz/descent_second_edition_solo_playpm0cu.pdf
    • https://cdn.sqhk.co/feruwapusux/0jfhig6/evil_dead_4_movie_in_tamil.pdf
    • http://sollabs.xyz/how_to_repair_cuckoo_clock_chaink1y0o.pdf
    • https://cdn.sqhk.co/vomofizog/0hhidaY/41916140788.pdf
    • https://cdn.sqhk.co/sezogitov/Tjdjhid/world_war_1_dates_timeline.pdf
    • https://cdn-cms.f-static.net/uploads/4422637/normal_6041b6f732d5f.pdf
    • https://cdn.sqhk.co/fezivabuja/gihHGib/vintage_speedometer_bicycle.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_45fbe31c49114e719e3326f9666cbb97.pdf?index=true
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_c05f76156a18455e9f05a42046980d1b.pdf?index=true
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_9f8d323287ec4deda328d0883872868e.pdf?index=true
    • https://1ba6f066-89d4-4445-b8a9-08a6de046ef2.filesusr.com/ugd/d40554_75b5ad6b34b2485fa2e6bb75987e4c1e.pdf?index=true
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_bacbbf88cb6c474fa2b9516559745ee0.pdf?index=true
    • https://s3.amazonaws.com/bupijila/wepadupodegitipow.pdf
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_3694f7198ad549df874a643a3b30cacb.pdf?index=true
    • https://s3.amazonaws.com/toliwudalamem/monster_hunter_world_pc_multiplayer_guide.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ea0.bin
b6be15cc5055bfe3355c0517ad4c4abed6ae6cbe71752093ccffed8a0c21651e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA0 4932 bytes
font_01_sfnt_off00015f42.bin
dac127b2d620836378d5affdd13e0f2f3eb959107ffb915ca2fe537741ec0432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F42 11460 bytes

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