Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c7ba72997218d8…

MALICIOUS

PDF

75.1 KB Created: 2021-06-12 09:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8c165b103ccf2d1202793c7c42fca204 SHA-1: 665576c63b8af36740acc1bfdfd0b20354812d1b SHA-256: f2c7ba72997218d87b49681e0b98e83ea03c8bd65cf38a9b71d8bad4033beacc
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to manipulate search engine results or redirect users to phishing sites. The embedded URL 'https://infrive.ru/pbw?utm_term=open+my+eyes+lord+i+want+to+see+jesus' further supports the phishing or malicious redirection hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://infrive.ru/pbw?utm_term=open+my+eyes+lord+i+want+to+see+jesus PDF link annotation
    • https://dopikilazobowu.weebly.com/uploads/1/3/4/4/134488506/lusagidamam-birexone-xisegufanupage-dozodonewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469824/normal_5feaf6586ad3e.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4382405/normal_60b18f161c73d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4473642/normal_60afec0fc710e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_6045e741b2ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455195/normal_6015d86c0f635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5fda5562925e4.pdfIn PDF document text
    • https://gikapizuwixa.weebly.com/uploads/1/3/4/0/134097763/xexuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_604780e0cd451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_604d19e413744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463275/normal_600a6e759181c.pdfIn PDF document text
    • https://pupuwovojetisig.weebly.com/uploads/1/3/1/4/131438468/xoxuva-palega-gaxamekaw.pdfIn PDF document text
    • https://vewejefimubi.weebly.com/uploads/1/3/4/1/134108794/2e235a15d92d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488346/normal_606aa7d2d33e9.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/df02c5db-0e55-4908-9029-0b02da296938/83484117902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78bc4502-e9bb-4807-87bb-14ba755294e0/21438160394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85485b25-7a55-4da7-8138-1eadffa4566f/the_cancer_journals_audre_lorde_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ada2e1-a6c1-4993-bcc3-086cd16a79d5/how_to_write_a_leave_handover_note.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702fbda4-3f84-4249-ac6d-9add9d79540a/92037446303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3562c5b8-35fa-4225-a29f-5b115a8d47cc/zilozasibinokuwajedej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b23fb79-51db-4e88-ab7b-35ccf2c6ccf7/pifekezibixogixalapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8158b0-bce4-47ed-b1be-233fb615604e/xedunotorunafozef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93807a09-3e29-4d25-9f54-edbbfd67fa9c/dheeme_dheeme_song_download_dj_mp3_bestwap.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_off0000e70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70D 5404 bytes
SHA-256: d9365d45c62cb937dfc6ebcf371cdd0812454e2925a7e7bf31fe658dc2b370d1
font_01_sfnt_off0000f96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96A 10964 bytes
SHA-256: dbfe6aa2772a31223452fb885ce1457cace9c052dc124b9a9c917b9112c23234