Malicious PDF — malware analysis report

Static analysis result for SHA-256 70eca25e6781e1de…

MALICIOUS

PDF

73.9 KB Created: 2021-02-25 05:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ddee829d0e317b67327d74f91536a267 SHA-1: e165fd356d286caa54eff9bd468655f5f8eff852 SHA-256: 70eca25e6781e1ded7ce44c09dc3665d0cee8975c6d5f6623c21a43c0362969e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent link pointing to 'maypoin.ru', which is flagged as suspicious. ClamAV and ML classifiers also identified this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest an attempt to generate traffic or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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.
  • 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://maypoin.ru/wb?keyword=trane%20xr13%20fan%20capacitor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454048/normal_5fdb123168750.pdfIn PDF document text
    • http://fastcreditreport.info/nifojexipomikemiwoin7vc.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/egfWZhh/total_conquest_mod_apk_unlimited_everything_download.pdfIn PDF document text
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/dimor.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/iiDjhjb/gotolixijibeguwotomazen.pdfIn PDF document text
    • https://cdn.sqhk.co/motuwezelu/ExoNIjj/8639548906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530910/normal_60267a2337b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_6017dc95ec398.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/h8LgiiD/car_mechanic_simulator_2018_pc_mods.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/bakoloj/71759065649.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/ranarogekedurogipumob.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/65704598556.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/term_end_report_card_comments.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/22851550508.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/bugaboo_frog_assembly_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/77351277757.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/uc_browser_apk_for_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/codycross_answers_group_142_puzzle_2.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_off0000e3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BF 5032 bytes
SHA-256: 2dae0ed282af159d1718d2f601b24452d2af5d605fd58961c02eb6cb7ea3702e
font_01_sfnt_off0000f504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF504 10960 bytes
SHA-256: 4fbdc068922c2dd1bc471b2802552e43a0315166a373b5747dd084fa37b0af5c

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