Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f147f0d8dffd3f…

MALICIOUS

PDF

71.8 KB Created: 2021-06-08 16:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fb8916591914140dbc11afb4a61f8e0b SHA-1: 45880e744bf8740d7cba51eb0f853db03f39b575 SHA-256: c1f147f0d8dffd3f8b64076ec0f04f8b02745151f951ea7f03d9433c48c88560
126 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous external links, many of which point to disposable hosting. The primary link, 'https://pixomot.ru/pbw?utm_term=how+to+setup+wifi+for+chromecast', suggests a lure related to device setup, likely a phishing attempt or a redirect to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://pixomot.ru/pbw?utm_term=how+to+setup+wifi+for+chromecast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408583/normal_5fe6364c1372a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473638/normal_5fe3b68bd7daf.pdfIn PDF document text
    • https://guzoxufogoxuwo.weebly.com/uploads/1/3/4/0/134097696/tofopoxipubapug_goxoweragazo.pdfIn PDF document text
    • https://genaxixa.weebly.com/uploads/1/3/1/4/131437685/guzawevumovof-sutunurupuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491933/normal_60b8339ef0ed5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420448/normal_6032d07192d4e.pdfIn PDF document text
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/5478298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_601ee0256ebc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393018/normal_60475e83b8f89.pdfIn PDF document text
    • https://milafesubori.weebly.com/uploads/1/3/4/7/134745217/530d2f1622d70.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zolunegoli.pbworks.com/f/tezigosafifawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318e087c-abbe-41cc-989d-f0cc377a5684/how_to_put_a_gravely_zero_turn_in_neutral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62feb8d7-a82c-4a17-a45b-b1b0f912a853/84841838357.pdfIn PDF document text
    • http://morabef.pbworks.com/w/file/fetch/144747324/best_buy_san_jose_del_cabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/602d9dfd-9d00-42b9-9700-94d6e0a97062/79134434225.pdfIn PDF document text
    • http://vesusezipuwe.pbworks.com/f/bunibutegibuserekoga.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/f/satlink_ws-6933_user_manual.pdfIn PDF document text
    • http://subazim.pbworks.com/f/89007022319.pdfIn PDF document text
    • http://mumasenekera.pbworks.com/w/file/fetch/144426759/todipixawonojewezizu.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/f/xazakuzagopes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e43bbda6-0be1-46aa-87d0-8e32a8935631/hitron_modem_cgnm-2250_manual.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_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 5276 bytes
SHA-256: 6746a42540fd0cb882c9ea84908c0e4e54efaa8a86ba2ab6319e16b740019ea3
font_01_sfnt_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 10416 bytes
SHA-256: 38a23ecb3d1ec942351f4a18fc3729553249bc48786bd98927c1a0eba33c90f2

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