Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29ea82845f145ac…

MALICIOUS

PDF

80.4 KB Created: 2021-03-16 19:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f5d288f01401cee5c26d56d0d0577d1e SHA-1: a66364196b864c9eb9d9ca2a29d34de85e3f407f SHA-256: e29ea82845f145ac0a70d27a799e4b38dee6ee82ef0e6ca6a31191c351ca60fc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, with one pointing to 'kirizuwapizu.rf.gd/13908126544.pdf'. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=pdf+to+cdr+file+converter+free PDF link annotation
    • http://lumurezekosarew.66ghz.com/38911104183.pdfIn PDF document text
    • http://luvatok.66ghz.com/17031516191.pdfIn PDF document text
    • http://gufutaca1.xyz/78674803512az6jc.pdfIn PDF document text
    • http://helplnstagramoffice.com/lazafufuxidifumesomoxoraje2n7d.pdfIn PDF document text
    • http://digtalcaliper09.xyz/imray_cruising_guides70knq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kirizuwapizu.rf.gd/13908126544.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/knowing_your_rights_worksheet_answers.pdfIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_776238d1c6934b3392b5cfff5fa5c4b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/44699053092.pdfIn PDF document text
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_96337fe38a284f28adc88eb8be6b16ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wewiro/bosch_dishwasher_silence_plus_44_dba_wont_turn_on.pdfIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_b09492602ace485f8b844034f93d9d0f.pdf?index=trueIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_b2bb479f6d8c4ee59ba1422da4655077.pdf?index=trueIn PDF document text
    • https://4461694d-a6f7-4a69-895a-ff5ddeb3c622.filesusr.com/ugd/f504fb_3df80d9e230f452db3b810fc536096e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/how_to_fix_a_washing_machine_that_is_not_spinning_or_draining.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/manual_de_agrometeorologia.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/vpn_proxy_master_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/719374692.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/pifabusoletijusuviw.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/dark_messenger_apk_ios.pdfIn PDF document text
    • http://waxukapavi.rf.gd/25524016069.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_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 4476 bytes
SHA-256: 8a0645867d0b5050ce076640af471820b32c96aa3f0286fb142b9a1b16eff086
font_01_sfnt_off00010102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10102 10680 bytes
SHA-256: c23e9eb3955ec36d64fe6d3c33e4618b72718df9f592df586de24ef86ecbd9b0
font_02_sfnt_off0001258e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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