Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32fda99e6178e9a…

MALICIOUS

PDF

96.7 KB Created: 2021-05-07 15:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 213c814ac759566aff53014b6f836422 SHA-1: 978caf05b0be6d3de35687673dec9293226b3524 SHA-256: b32fda99e6178e9a593046d1cfa15a648c13e91c07714426a256b04e8484e562
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a link farm detected by heuristics, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/strik?utm_term=pearson+ap+calculus+textbook+answers
    • http://tijudozi.scienceontheweb.net/my_samsung_washer_wont_spin_out.pdf
    • https://cdn-cms.f-static.net/uploads/4482207/normal_6051e47365f80.pdf
    • http://sozimaxetupow.mywebcommunity.org/53540233648.pdf
    • https://cdn-cms.f-static.net/uploads/4495974/normal_6065f4e27cbc4.pdf
    • https://static.s123-cdn-static.com/uploads/4479942/normal_5fcea28c71180.pdf
    • http://kopaburak.sportsontheweb.net/roman_centurions_753_31_bc.pdf
    • https://cdn-cms.f-static.net/uploads/4480403/normal_603f5b7dc0092.pdf
    • https://cdn-cms.f-static.net/uploads/4418167/normal_6065c17d7c60a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_1c06e93559eb4257b692a6c504e1959d.pdf?index=true
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_b25949b8ffc741999db475c126b1584b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d22f0e23-711e-42d1-afd7-692fcbe72e32/xfinity_xr2_remote_guide_button_not_working.pdf
    • https://uploads.strikinglycdn.com/files/5dfba0fe-0906-4328-b9e7-7a5d2d6a8a56/where_are_amana_electric_ranges_made.pdf
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_46acae11a039410497274376f3d6daec.pdf?index=true
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_59f176784f6c42a7be3717203dae2dee.pdf?index=true
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_aeeebafe52624bbdb27cbbd866a8ed3e.pdf?index=true
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_c07d1527c73a4e9ea3ac444f4a333b9f.pdf?index=true
    • http://lijowavatajo.myartsonline.com/vabomopulil.pdf
    • https://uploads.strikinglycdn.com/files/abd55ce7-2c6d-4c16-9645-f687a6aa8aeb/vimenedazagububemugotot.pdf
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_f0a9a576dd894f8e946166cc54ddf8e0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2c38fe2f-e055-44db-bda6-0e2e3dfcb5b8/how_many_cubic_feet_is_my_kenmore_refrigerator.pdf
    • https://uploads.strikinglycdn.com/files/80d6bd4e-908c-4f69-a3f5-18704f280aeb/wezuxufopu.pdf
    • https://2bb9e989-9ce9-409f-aa8a-839f2ea8d3bf.filesusr.com/ugd/9f8cc2_9fe801b9762d4eea961b6c657fbe42b6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bd48cd56-72d1-4175-8e92-8c8861cde5cf/riluxevade.pdf
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_00fb85ff840d4a608a2aa266117bd783.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139d9.bin
fc21819dc4e3da273e936f5485da6d994d008969028a6de86dc33665500aae20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139D9 5292 bytes
font_01_sfnt_off00014bf3.bin
b5fecb6d612b38f42fbc2761181eeb2065e128932df0b44f81aff71ab3410c8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF3 12228 bytes

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