Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d01c5ed1c00284b…

MALICIOUS

PDF

108.5 KB Created: 2021-03-16 01:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dfd6d1fc965af086a156d3dad7336510 SHA-1: b5c75449527241753395892e8c6ffa66549145e9 SHA-256: 9d01c5ed1c00284bc76b4614287e01a9f757fc16e8797de21675083bee34a686
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of a ML classifier flagging it as malicious and ClamAV detection further supports its malicious nature. The document body, though heavily obfuscated, contains text related to 'pre workout legal' and application metadata, indicating a potential lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=is+pre+workout+legal PDF link annotation
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/doxipu-rosuvuveka-zedosasopob-regezulapikolin.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/3646221.pdfIn PDF document text
    • http://nivawegokex.22web.org/iala_vts_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_6044f938248ec.pdfIn PDF document text
    • http://jedugefipevama.iblogger.org/acog_guidelines_for_breast_cancer_screening.pdfIn PDF document text
    • https://resusogid.weebly.com/uploads/1/3/5/3/135346187/18e48be85abc431.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/makonatabage_bigetilidowa_palonine_givokoril.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_6019787144075.pdfIn PDF document text
    • https://velonifiwivuli.weebly.com/uploads/1/3/0/7/130739758/kupesowuxofomadupu.pdfIn PDF document text
    • http://pixilapusir.22web.org/ml.net_tutorial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f07d9a05-b65f-44c2-ac7f-47dcb1514d04/software_development_project_management_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd8dbdf2-3c86-4fdc-be9f-b85574509228/after_we_collided_film_review_guardian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75bcda33-36de-441a-8d14-6411261635ff/vanijulavi.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/physics_textbook_class_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e1477d-8e54-4a95-8ba5-3e9db08c8dc3/doresalugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be85463-5f0e-46e2-beb1-20129207087c/what_color_is_the_remote_wire.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/black_holes_wallpaper_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5612aafe-908a-45bd-8905-92bc29c7175c/14555216562.pdfIn PDF document text
    • http://zexubadisaki.rf.gd/when_did_original_wii_come_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f709c8-2107-4485-895c-4c2f2b745b49/how_to_get_rid_of_ivy_ground_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8f0100-57bc-46bc-bec7-8a35f78876af/how_to_activate_your_p_ebt_card_in_nj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d03820-696f-4ee0-8765-4840960960bd/boss_ls-2_clone.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001683e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1683E 5080 bytes
SHA-256: 06c6743e8c949f3592c55820349fab3d71b7f80221783df2d1eb71b56b5d32e8
font_01_sfnt_off000179ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179AE 13224 bytes
SHA-256: 6323a18e6e28293bd0cd368d5dccc7e37ce22e4a43bd5b77a7e078addbae7955