Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2aeddef168ebea…

MALICIOUS

PDF

79.2 KB Created: 2021-03-01 07:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d9f7b80b9381f14267b55ae7413b6897 SHA-1: a6a96063adfe9fb4d103dec98182003d934eb2fb SHA-256: 7b2aeddef168ebea868bcf88c6a0e2561b2f7e03afb9f070393320b1da4a5472
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=ashton+kutcher+brother+pictures PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411489/normal_5fea18c739db5.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/gjfFacP/lopefivadawasobewuwuje.pdfIn PDF document text
    • https://mabodezi.weebly.com/uploads/1/3/4/5/134590290/mikotakexave.pdfIn PDF document text
    • https://pepazosek.weebly.com/uploads/1/3/4/1/134108786/xibapazukijawo_gopemuwodufoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_60389239939b3.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/21628164740.pdfIn PDF document text
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/mazavixixosolo.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/how_long_to_put_jerky_in_dehydrator.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/evenflo_aero2_ultra-lightweight_double_stroller_canada.pdfIn PDF document text
    • https://fezapatinegu.weebly.com/uploads/1/3/4/2/134266508/e81eb66e6b5efc.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/j2qjbja/bholes_color_hole_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/bf6uhcl/car_flying_shooting_flying_car_simulator_games.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/how_much_does_a_forensic_scientist_get_paid_per_month.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/dior_forever_skin_glow_2w_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zevusup.atwebpages.com/hp_photosmart_5520_printer_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/agathiyar_tamil_film_free.pdfIn PDF document text
    • http://milebulijulami.onlinewebshop.net/20256532914.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_off0000f8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EB 4972 bytes
SHA-256: 3476eeedb3d4450cffef2f110d1ae965510e14dda7e3e48e29af3eee3fd2560c
font_01_sfnt_off000109d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D1 11236 bytes
SHA-256: 3f4446115576f0516e2e746aee578c337c78a2d53302d8fd3bfeebbea1686544

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