Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb99d73b68410fa…

MALICIOUS

PDF

80.5 KB Created: 2021-06-11 08:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f7a5926573a793ade31644456015e32e SHA-1: c868fd9def7a8637538ac6e26b9ecdcb37b7b58b SHA-256: adb99d73b68410fa15e6fe74519c3914adc0adbb69136cd9395d2b7aa8b6cea6
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a prominent one leading to 'allytemp.ru' and a query parameter suggesting a movie lure. Heuristics indicate the PDF is a link farm on disposable hosting, and ClamAV identifies it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/pbw?utm_term=365+days+full+movie+watch+online+free+english+subtitles PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4413850/normal_60afe8d517486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451556/normal_6047464fa19a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475863/normal_5ff60c1b9f99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_605d69e6600c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483349/normal_5fc7db3c9423b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_605d6ae0b301b.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4443799/normal_60b71f768b46d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470830/normal_5ff53031d3d8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377933/normal_6055fd8388eeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_6066f489676d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wijozuzapusa.pbworks.com/f/deboluxojufujiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932f196d-e683-4403-894a-ec9adc996141/bezujezujaban.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/w/file/fetch/144437016/18262870266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc0d4fe6-4923-4683-8b2c-36cdaef8e7eb/19024044749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/badf61d8-911f-442e-bd55-355c0bfb3096/how_to_reset_breville_descale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe7fb36-c20c-4ca0-adee-daec9bc6c05c/anet_a8_octoprint_firmware_update.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/144422439/pimawovunipiwuwi.pdfIn PDF document text
    • http://pidexuxok.pbworks.com/f/gta_online_solomon_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240d73a0-638d-452c-871c-3f53de53f19e/vowemuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0824e362-07f1-438a-bc6e-ca6b4d24eec3/54608510835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5d47b0-de49-4302-a459-596e8ba16690/craftsman_16_chainsaw_chain_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5efe148c-028d-498d-aa09-b74e21e6189d/after_we_collided_netflix_release_date_australia.pdfIn PDF document text
    • http://maxasol.pbworks.com/w/file/fetch/144683946/select_image_from_gallery_android_fragment.pdfIn PDF document text
    • http://niluputevi.pbworks.com/w/file/fetch/144699342/pokemon_go_hack_android_apk_latest_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b143ab0-79ee-4f78-9e2e-fe36c0c2583f/the_prophets_hair_salman_rushdie_analysis.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_off0000f8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B2 6176 bytes
SHA-256: 5b1720a06c64120efc36a80fb805f09febc53833744ae87f5a345c071eb4f7c6
font_01_sfnt_off00010da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA7 11044 bytes
SHA-256: fcc1d3b906997c0169b1014131ffac98a0eb47bf5dbebf9d7dd64450687c880b