Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fe9311f03ce8bf…

MALICIOUS

PDF

82.6 KB Created: 2021-03-19 05:17:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7af97d0d8db8fa727ab0d24c598d2184 SHA-1: 3642dfcc0287e2157d29bd9d541dcaa3e3c421a2 SHA-256: 97fe9311f03ce8bfaaf760d7c0045a6ccf1944d7d8d46b1b2e166c4cdf278b4a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing and malware distribution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/wix?keyword=hisense+air+conditioning+manual PDF link annotation
    • http://podarokinsta.online/dazalozinotylfl.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/lRogdij/piano_music_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/iKjeiee/frayer_model_template_6_per_page.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/a9geKjb/lg_xboom_go_pk5w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477167/normal_600c3be4881b8.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/gdAzchc/crossword_puzzle_books_in_bulk.pdfIn PDF document text
    • https://cdn.sqhk.co/kukabelek/jhCie5H/global_citizen_festival_2015_celebrities.pdfIn PDF document text
    • https://cdn.sqhk.co/gasalikuviz/8vzMZid/pro_pinball_the_web_ps1.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/hhjdhid/43068504625.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/chamberlain_liftmaster_41a5021_1g_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387920/normal_5fdebc3a6f039.pdfIn PDF document text
    • http://steelsho3.club/xetusivofivifijexaeqlmk.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/jja1XGV/20253659440.pdfIn PDF document text
    • http://jakartapro.xyz/the_one_minute_manager_meets_the_monkey_download5k3zb.pdfIn PDF document text
    • http://energierecrute-emplois.com/80948444158u9wu2.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/NPPChgR/human_eye_drops_for_dogs_uk.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/kandungan_binahong.pdfIn PDF document text
    • http://sodalabs.club/96651830853858hh.pdfIn PDF document text
    • https://cdn.sqhk.co/zimofuzam/hfUiiZV/bhai_movie_song_mr_jatt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496013/normal_604ccac45482c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/443c352e-6506-48c1-96de-23be9d45743a/rulizifalusibovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69086eb1-ec60-4ce2-a63c-c75f53d06988/blackberry_classic_2020_verizon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7134bdfc-2712-401f-b8fe-a3c64939c5db/vibawiwoxofoxuf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8E 5220 bytes
SHA-256: 15c3dbe024946e894a156b20c41a7bc03b3ec1dc10fc224707973761c996b5fc
font_01_sfnt_off00010134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10134 11264 bytes
SHA-256: b8ff4e7c7a5783a373d648117d468126926b070d8c358afdd708837b99b04532
font_02_sfnt_off000127ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CE 16132 bytes
SHA-256: 0845746d8e0f76c2c57e53a5d0c2d2ba36ed31c4724e2802406f297ba1795667