Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2358f05f6ff24b5…

MALICIOUS

PDF

78.9 KB Created: 2021-01-17 15:06:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 25185cd9467e74168f1a9bb8f5076333 SHA-1: d36a287cdd11a1864dd2d6e54d481f078fcfc7da SHA-256: a2358f05f6ff24b561db9afb69d63556c61f5edbed4a00f346bd583146bb478d
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, and ClamAV detected the file as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous links suggests an attempt to direct users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=pet+sematary+2019+imdb+parents+guide In PDF document text
    • https://gobebirerelimi.weebly.com/uploads/1/3/4/6/134651667/kekimibozobadofedub.pdfIn PDF document text
    • https://cdn.sqhk.co/sologavabo/jKhbsqM/kewewud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486994/normal_5ff8a4f847154.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409092/normal_5fc9dadb75437.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/ewwggie/don_t_feed_the_monkey_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fc5c1f9879b2.pdfIn PDF document text
    • https://fixemebipufuw.weebly.com/uploads/1/3/4/1/134131586/bivix_vebesibosi_jumerafi_jugivenepu.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/zusok_likoto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416669/normal_5fcfa1b21c51b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5f8a604b97a38.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/WMQvKIe/huey_p_newton_quotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417329/normal_5fa21563bbdc2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/adventureland_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/airport_extreme_router_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/2585482646.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/26338848994.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/adobe_illustrator_cc_2017_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/blob_file_from_database_c.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/wedding_couple_vector_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/the_sooner_the_better_debbie_macomber.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_off0000f5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E0 5972 bytes
SHA-256: 7e68fd128532ee4b37eff15250b281ea663d8b30f956ffa84cc51649dce05ae7
font_01_sfnt_off00010a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A16 10656 bytes
SHA-256: 6e91054ad7c7b40a2657ae6ab9e5448e1ca4b671a3043780416bb86e59854319

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