Malicious PDF — malware analysis report

Static analysis result for SHA-256 589c5debd16511fb…

MALICIOUS

PDF

74.8 KB Created: 2021-05-21 06:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 710604e2a85f98a52c5b49fe7624326d SHA-1: 29dc500ea876006befd9bb4232107b652e046cc7 SHA-256: 589c5debd16511fba14dbb43aa8162fd98dbd91d7c16d491fa6def805325788c
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and potentially phishing-related. It contains a large number of embedded external links, suggesting an attempt to direct users to malicious websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or link-farming attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=karaoke+estacion+sui+generis+tab PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420776/normal_5fecfff75660d.pdfIn PDF document text
    • https://regapopuro.weebly.com/uploads/1/3/5/9/135964604/zeloxusig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_6054da3921e19.pdfIn PDF document text
    • https://vojufutevale.weebly.com/uploads/1/3/4/5/134521456/xitifamufaj_kejobupavatab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_601e0adc3cb86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_604654415a57e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403428/normal_5ff54010d337d.pdfIn PDF document text
    • https://kepedeko.weebly.com/uploads/1/3/5/9/135959580/feviso-fevumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380858/normal_602e7182d08ea.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/pogolo/76150626241.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/best_wagner_paint_sprayer_for_decks.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/tebowapopusugazi.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/tedijiwaripimewugulutipi.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/is_there_a_totally_free_criminal_background_check.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f199fee4-2c46-46f3-9633-a547921d1b37/sisters_book_by_raina_telgemeier_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f008167f-0a15-4eed-8708-26ac43c32112/27351256553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f841000-82eb-45bc-bb46-4751728099f4/download_gimp_2.8_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78b6f6c1-e9bb-41f8-a9fd-47cd30403c08/percy_jackson_and_the_lightning_thief_characters_list.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/venot.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/importance_of_indigenous_knowledge_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/barotrauma_latest_version.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_off0000d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 4992 bytes
SHA-256: 8c77a6c9e3e9f1caa72d4803eb7e53abba2e89a09801c53fd6da6f41ba4213ed
font_01_sfnt_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 11264 bytes
SHA-256: f4a5679a191693418b8c520b9bce49789265f7804faf67fe484f302a6bffa4a4
font_02_sfnt_off00010f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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