Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a9fc63f94c26e1…

MALICIOUS

PDF

108.2 KB Created: 2021-04-01 17:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9f8652630479bc9e8027723237488621 SHA-1: db5c010061a84b1fd691b13d502766d727638e8c SHA-256: c2a9fc63f94c26e1f3b59da4d2f1b0dd36bbe7bef9b21d063b21bc05fe9949b0
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a "printwhatyoulike chrome extension" lure. Heuristics indicate a link farm on disposable hosting, suggesting a phishing or SEO scam. ClamAV detection as Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/wix?keyword=printwhatyoulike+chrome+extension PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413967/normal_603decc20d5d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_602ae5288ffc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413240/normal_5ff183c3bd550.pdfIn PDF document text
    • http://zapitexidij.mypressonline.com/pepuzotafutafigupamizek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_6038d1ca7a9e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458614/normal_60222f5955995.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/Liegcha/my_first_bible_songs_piano_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_60617ed5072f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485454/normal_5fdb87b4a573d.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/have_tesla_prices_dropped.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/98285439631.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/criminal_background_check_form.pdfIn PDF document text
    • https://cdn.sqhk.co/kikutajaz/gejidjc/top_motown_hits_60_s_70_s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444885/normal_5fff4d690bff7.pdfIn PDF document text
    • http://desawigoxikugaw.mywebcommunity.org/kixute.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3926d074-74ab-41cc-aa9d-340192ccda4e.filesusr.com/ugd/5619e7_54eed5ff00d34b2cab8449f6406f071e.pdf?index=trueIn PDF document text
    • http://sifebitufol.onlinewebshop.net/area_and_perimeter_of_l_shapes.pdfIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_57d971b70a504c6ea16f1131c398cbab.pdf?index=trueIn PDF document text
    • http://gukutimaguvuzum.onlinewebshop.net/wozuwojumibogikup.pdfIn PDF document text
    • https://9aef9be9-4304-4ec6-b02b-ded1eabc5d1b.filesusr.com/ugd/a571b8_9fc94cfc2e59492e8cf9b2d0de0b6ac6.pdf?index=trueIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_1cdeeafd73814d46a3232a73abf58618.pdf?index=trueIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_ba756e7d0fab4d7ba43f0430c9cdb9cf.pdf?index=trueIn 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_off000165af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165AF 5364 bytes
SHA-256: fdffcbcf5f0f79b6dfa64b9805d4fd5049860085a8fcd677bca717141db6959e
font_01_sfnt_off000177db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177DB 12160 bytes
SHA-256: 826b70ad1583c48f06d5c900e6398a48b3a12c8972a3fe3efdb983580a26e623