Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d2dbc8e32a452a…

MALICIOUS

PDF

84.9 KB Created: 2021-03-22 02:33:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df2d9a38f9ee21249e7a0d44de1c2e46 SHA-1: 20addef186cea113a7360a2cb69d151b465d7785 SHA-256: 67d2dbc8e32a452af6ea799999d69f06484e46dddb6f0f91f5fe13c0f45530de
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on suspicious domains and appear to be part of a link farm designed to obscure the true malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive external linking suggest it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/wix?keyword=one+piece+treasure+cruise+story+guide
    • https://sazulolako.weebly.com/uploads/1/3/1/4/131453808/1706621.pdf
    • http://leafester.online/26665530708pxtlt.pdf
    • https://bubituzujolumet.weebly.com/uploads/1/3/4/6/134647672/f44a4ae04.pdf
    • https://zirotowaze.weebly.com/uploads/1/3/1/0/131070424/rulowuzi_pevuxaro_jeroza_migelewo.pdf
    • http://mazejofeg.mygamesonline.org/materi_tentang_amdal.pdf
    • http://good-production18.site/camera_for_obs_ios_free5rgb3.pdf
    • http://thecabinets.xyz/explain_human_resource_management_functiongf0mj.pdf
    • https://roguraluvi.weebly.com/uploads/1/3/0/7/130776180/giferokixobanak-mopumeb.pdf
    • http://gagogepatajebe.medianewsonline.com/calculus_example_problems_with_solutions.pdf
    • https://luribexibaw.weebly.com/uploads/1/3/4/7/134750384/pogogobof.pdf
    • https://ralubimuxafoku.weebly.com/uploads/1/3/4/3/134373731/torivojojoj-tufadomobof.pdf
    • https://lobubanir.weebly.com/uploads/1/3/2/8/132814664/fipixuwomus.pdf
    • http://lotsmen.com/chinese_characters_fortnite_nameen5kw.pdf
    • https://pikimitif.weebly.com/uploads/1/3/3/9/133997727/xedopuku_fikirigenulekem_dulenefijobase_getutuxe.pdf
    • http://re-prime.ru/what_were_the_causes_and_effects_of_the_migrations_of_bantu_speaking_peoplesbeksg.pdf
    • https://pulufakifene.weebly.com/uploads/1/3/3/9/133999255/e8a5ab04e98181.pdf
    • https://jazigibebegada.weebly.com/uploads/1/3/1/6/131606339/mobevugitir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ed4a4821-08bb-4869-9017-3087c59edec4/traxxas_summit_1_16_servo_upgrade.pdf
    • http://tebaputazaxuva.myartsonline.com/bodiwidomugikofog.pdf
    • https://uploads.strikinglycdn.com/files/9b7eb478-ada9-4779-a855-9e4a5da8014e/what_is_the_best_translation_of_journey_to_the_west.pdf
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_92c4785b160b483f8d8c292e7022db70.pdf?index=true
    • https://uploads.strikinglycdn.com/files/646b5395-e865-41bf-926c-a080618f8add/behringer_xenyx_302usb_premium_5-input_mixer_with_mic_preamp.pdf
    • https://uploads.strikinglycdn.com/files/2fb6d34d-ab54-483b-ad6d-cfcaca5bfd71/86733286277.pdf
    • https://uploads.strikinglycdn.com/files/132a3070-9832-47bb-b737-7ca9f5749ab3/how_the_bible_was_created.pdf
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_3e50c0d2153d463aa1cd1a9f189d6bba.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_off0000fe04.bin
9b0cc22f5e9068677adf1861fc6a8fbbc0fdab904c4e4235d991afd44cd6725b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE04 4184 bytes
font_01_sfnt_off00010cdb.bin
53430a340ead8d3daeb0bbf362ad34d16f780d0b0d783c01753d82ce49f3d664		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDB 5340 bytes
font_02_sfnt_off00011f11.bin
8ce736319f1ec30a9b41df3c14cdea326ca4b346e3b32d929eaf627f9d3a8e32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F11 10848 bytes

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