Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2bc6de2046e88e…

MALICIOUS

PDF

129.3 KB Created: 2021-03-29 13:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 64966ce4fed229f1256637fecd6dd605 SHA-1: b1b76224885d8eb381a287c0cec42094ccbeb4eb SHA-256: ae2bc6de2046e88efcdc1359a44631099779815a7b0909afda67566373ae2d3e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://botokaw.ru/123?utm_term=autocad+2017+keygen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473642/normal_603a2bfabebfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389585/normal_5febfd6bb5a12.pdfIn PDF document text
    • https://cdn.sqhk.co/mifebemige/cDiajdw/xifabopamoniwura.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/ghahbii/part_time_ecology_jobs_near_me.pdfIn PDF document text
    • http://rijemilev.iblogger.org/23233303785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492253/normal_604134b22770d.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/hQTSrhe/14681499439.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375358/normal_600687162c178.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_4835fc63a9f34f1f8a3c65b64b87116d.pdf?index=trueIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_f17c45438eab4e2bb61f5c006364379c.pdf?index=trueIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_6a27459b790b46c3a36568678e19a8c0.pdf?index=trueIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_e9b4cbb92cd648818dead9cd371a3ee2.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_990ff54c22ca4208bcadbc8b3a0295d8.pdf?index=trueIn PDF document text
    • http://kurejaj.epizy.com/how_do_you_prepare_fresh_pizza_dough.pdfIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_64778048992a4fa29494e849c951b710.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safago/lumejigevowatefoxodesabu.pdfIn PDF document text
    • http://bukumetaboxalo.epizy.com/best_smartwatch_with_calling_function_in_india.pdfIn PDF document text
    • http://lagamifex.epizy.com/rto_learning_licence_test_book_marathi.pdfIn PDF document text
    • https://adc67df4-9ac4-4169-8225-f8d60376216a.filesusr.com/ugd/a1c2c7_28879addeda345338349f6e4011099c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/autoformation_windev_mobile.pdfIn PDF document text
    • http://zuwemanikipe.rf.gd/79472217703.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CF 66836 bytes
SHA-256: f08de27571569286e947b5538b84245ef55f5dd77d07d38dc889b1a3705a5273
font_01_sfnt_off0001bdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDF5 5364 bytes
SHA-256: 39e5027d2e001aa6ddde40fb21c41aac01a73565de91cb944e3ae9056fea02d6
font_02_sfnt_off0001d069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D069 10636 bytes
SHA-256: 37000714920924793e93e770e6ff6f3a1160db76cb330e73d54c03c79c311cdf