Malicious PDF — malware analysis report

Static analysis result for SHA-256 022dad0d1fc6d234…

MALICIOUS

PDF

80.5 KB Created: 2021-05-13 09:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c5fb086a45388707cc1c18f85f4bea60 SHA-1: 40c23731f37fdf5c8311cbb4a6acb96fc6fc90ec SHA-256: 022dad0d1fc6d234a544de601e2ef973d98bbc521842dfdfeb13d9906b55a6dc
186 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm designed to redirect users to external websites. One prominent URL, 'https://jacksth.ru/strik?utm_term=toro+power+clear+180+recall', suggests a phishing or scam attempt related to a product recall. The presence of numerous external links, some hosted on disposable domains, further supports this. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=toro+power+clear+180+recall PDF link annotation
    • https://cdn.sqhk.co/jobubexivex/qibgiV3/history_of_mali.pdfIn PDF document text
    • https://cdn.sqhk.co/rivinodati/cgjijie/boss_fighting_simulator_codes_wiki_mejoress.pdfIn PDF document text
    • https://cdn.sqhk.co/mepofazobi/ih89jfH/fruit_chopper_for_sale_canada.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
    • https://s3.amazonaws.com/ropidadegaxut/zogomoluginukalesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5faa9367-38bb-4f5e-a00c-d59ba79edd44/fawimewivevaxu.pdfIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_7a9b41f087c84b91a3d7b2e3dd618819.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/29246868159.pdfIn PDF document text
    • https://486a928f-df87-4682-b39c-9199637d78f9.filesusr.com/ugd/982a49_e6630b5349c142df99c34b91647f2f15.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d21b99-1533-436e-803d-bb9f7f24c077/jivulubazonesexufubivife.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/20980337887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32651f86-d732-4171-bc35-d0c24adfab6e/how_much_is_bill_from_texas_metal_worth.pdfIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_d5ea7520286a4bdd904bb1b7c196b84a.pdf?index=trueIn PDF document text
    • https://e148473a-3d1a-46f8-b788-fbc1f5af68d4.filesusr.com/ugd/e1e70b_5680a77ab55e402d9b963fef8e2be131.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_6a5570f78bb0405eb8790160ec167691.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a940d90-543f-4a80-af12-6ac40b37091d/how_to_sew_a_simple_face_mask_with_pleats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29fa8573-3fa1-4a96-bff5-1647fde59b13/dish_network_hybrid_lnbf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668a6c20-eedb-41da-8fe4-a29bafcf48bb/megimare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/301914f3-fa29-4303-bbb3-c48e6f4db0a6/53124049993.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_off0000eeb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB9 4732 bytes
SHA-256: 6a1f4aa492c9f4603b0bc4b6152bc5012502fc668c9926628662e17ae86474a6
font_01_sfnt_off0000fee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 11936 bytes
SHA-256: 11769cd55abcdc8937ccd939d826ae843ceb9030697936c80ed160815f5fe3ce
font_02_sfnt_off0001270a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2