Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad046de7dd1327e1…

MALICIOUS

PDF

90.2 KB Created: 2021-03-18 01:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d88ce1aa37c266ca4990b4329528f51f SHA-1: e898b2fd6b1f9fba62d7e62fd6a44ea256521fb6 SHA-256: ad046de7dd1327e1c0170f65326ab72b01b3774c9d52833e35698d174d6eb119
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware sites. The document body, though heavily obfuscated, contains keywords related to software development, which is likely a lure.

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://xezojetit.ru/award?keyword=lean+software+development+an+agile+toolkit+poppendieck+pdf PDF link annotation
    • http://gudelew.mywebcommunity.org/philosophy_for_beginners_oxford_podcast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_600e58eebf572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475016/normal_6051c90d2a166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409096/normal_600195bc45820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_601ed9b3d7ad4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_b2346295d312478181633369db04e339.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd1809d-6654-4300-a4ae-8b0370b4b592/neil_diamond_jonathan_livingston_seagull_full_album_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653b475f-85a0-436a-99e5-5c5391a978cb/befubufopipifuserosogugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a85a30-1563-4551-a0cd-565c0556b0fb/margin_of_safety_book_seth_klarman.pdfIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_6d480e8d9ea24f8296839482c8ee905f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e87189c-2718-4ff4-a3e8-2e3dfb661f64/10_x_10_grid_image.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_0aab093863484e8489bdd9118ab03c95.pdf?index=trueIn PDF document text
    • https://05b56818-8b0b-4484-a411-4f1234233f1c.filesusr.com/ugd/e49726_611f25923dd04804a6a2e41489ad6d4d.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_c61a267637574c0080ecca5851819404.pdf?index=trueIn PDF document text
    • https://8ab8d0a6-ebcf-4503-ac90-3c5d9a0926ce.filesusr.com/ugd/8585d4_a914b2150b5e4c92bedfbaadc98832b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5545e9-df1c-448a-9d25-881a79ea5d8b/samsung_s21_launch_date.pdfIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_a2853e6aa0724a28962f2f1ed2373c4b.pdf?index=trueIn PDF document text
    • http://foxukekamusun.onlinewebshop.net/8697619348.pdfIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_b1db43ca7eb44ddab90b81267ede963e.pdf?index=trueIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_e70a8de7799648e7903f2cef792f34c3.pdf?index=trueIn PDF document text
    • http://fadezanunadafik.myartsonline.com/a_byte_of_python_by_swaroop_ch.pdfIn PDF document text
    • http://dilutibu.onlinewebshop.net/kusovixijelurawatigaves.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_off00011e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6E 5632 bytes
SHA-256: f06b51f790454d83ab8164382debb233a79349c8616f1b6746b8ef22b7890a8d
font_01_sfnt_off000131a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A7 13144 bytes
SHA-256: 9bc4f9a972c37c06522cf49572d55c8e429eba4c7a70d8655c96d0c0863a02b7