Malicious PDF — malware analysis report

Static analysis result for SHA-256 89655d5ae8f0e017…

MALICIOUS

PDF

79.0 KB Created: 2021-03-27 19:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5409df1130db559bd5fe44d7e34e987b SHA-1: ca814ae9a83968aac1cbbdb8b0630ad19cd29d38 SHA-256: 89655d5ae8f0e017d9cb0244d956137a92871b66ac2edba106ac6a58dd112d74
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 operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a phishing or scam campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/wix?keyword=crystal+hartz+ramp+test+answers PDF link annotation
    • https://cdn.sqhk.co/naxupowu/ighvthi/pregnancy_baby_week_by_week_size.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/eXhdijN/70922203909.pdfIn PDF document text
    • https://pakoverixofe.weebly.com/uploads/1/3/4/7/134771358/6060439.pdfIn PDF document text
    • http://beautytopshop.site/supixulikabaxamozodej0pn7l.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/8C9idjb/vozilimaz.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/jdEhfum/3550977954.pdfIn PDF document text
    • https://nipotowolexitav.weebly.com/uploads/1/3/4/6/134639117/xuroj.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumila/3jfEqpb/free_online_flyer_maker_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/rewanizotaj/ah7Znid/mortal_kombat_11_female_character_designs.pdfIn PDF document text
    • https://dalegoronatodul.weebly.com/uploads/1/3/4/3/134309481/4766029.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/cmieZhj/nubevadulujobudiv.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/12fe6bde6125277.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/hCjs4hb/fixagiruzedolivewapuvofos.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/g9ajhgh/mansions_of_madness_second_edition_best_scenario.pdfIn PDF document text
    • https://cdn.sqhk.co/wamamuli/jhcBCHe/rotten_tomatoes_best_rated_movies_2020.pdfIn PDF document text
    • http://universityru.fun/nukobefosijowuwozeli9908x.pdfIn PDF document text
    • http://cadenalia.com/what_happens_when_your_dryer_doesnt_dry9i46s.pdfIn PDF document text
    • https://nametipij.weebly.com/uploads/1/3/1/1/131164318/zaruwuzomofawile.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/hji4skt/cheque_book_ledger_template.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/gihWje5/power_starz_ghost_and_angela.pdfIn PDF document text
    • https://cdn.sqhk.co/vozogekom/3Beumhc/10249062264.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/likerajatob/shimano_alfine_8_maintenance_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/brazil_vs_england_2002_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/hd_background_blur_pictures.pdfIn PDF document text
    • https://www.lcb.pa.gov/Education/RAMP/Pages/RAMP-Certification.aspxIn 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_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 5208 bytes
SHA-256: 28e6dfafd22217745972760ca1149c59909de3fb75c07dde74790a0cffdc5633
font_01_sfnt_off00010779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10779 11440 bytes
SHA-256: 9e88127affd19c927d29cf46b3d9c679f7a6ce3cc9dd8442d8da8e398ab8d117