Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20af59af46f5c0c…

MALICIOUS

PDF

106.0 KB Created: 2021-03-12 02:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5f3c3241bf41b65f815ba86d7a7dcc44 SHA-1: e01770908f11b12873e98eede53996ef30c00a23 SHA-256: f20af59af46f5c0c2b1aa660bf1f8f4c1fb8549c58ada696a8ed4d0bf66b5de1
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the ML classifier strongly suggest malicious intent. The 'SE_CALLBACK_LURE' heuristic further supports a phishing pretext, although the specific lure is unclear due to the document body being heavily obfuscated and truncated.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://soxebez.ru/wix?keyword=ruger+mark+1+sights PDF link annotation
    • https://cdn.sqhk.co/fagaxirupunu/i6eKq2p/magic_jigsaw_puzzles.pdfIn PDF document text
    • https://cdn.sqhk.co/godajaxox/ggD6Ogh/police_moto_bike_prisoner_transport_3d_download.pdfIn PDF document text
    • http://fituxem.sportsontheweb.net/negidevopiv.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/dimensions_of_a_18_cu_ft_refrigerator.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/ichgii6/30275775433.pdfIn PDF document text
    • https://cdn.sqhk.co/pepigovagove/dSigrig/mibutovuwulasavebivam.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/heAw2hc/strategic_business_planning_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/rulowoka/ibQSzsc/zezuvifeputogiregekuvabo.pdfIn PDF document text
    • https://cdn.sqhk.co/pivatiwon/4Wjda4Q/73710786850.pdfIn PDF document text
    • https://cdn.sqhk.co/zarifabidit/ie1igeZ/real_gangster_city_crime_vegas_3d_2018_apk.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/luxijeresinuzukitatil.pdfIn PDF document text
    • http://makoxiniponino.iblogger.org/alkaline_herbal_medicine_aqiyl_aniys.pdfIn PDF document text
    • http://difipalilif.scienceontheweb.net/dbms_stats.gather_schema_stats_list_stale_example.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/zumezeviwakiz/8374760884.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/primary_school_applicant_copy.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/computer_arithmetic_algorithms.pdfIn PDF document text
    • http://tesumavifan.epizy.com/which_flowers_in_the_attic_movie_is_better.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/how_does_a_cool_mist_humidifier_work.pdfIn PDF document text
    • http://memunameno.epizy.com/revebare.pdfIn PDF document text
    • http://dezoruxeg.epizy.com/mifotawub.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/rotebipemigaw.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/foil_backed_insulation_sheets.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_off0001596a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1596A 5192 bytes
SHA-256: e38cb1b3726ff6bd93fb1f7d45bbb7b4b22355a0c4e31059c29781d55161ef84
font_01_sfnt_off00016af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AF1 15420 bytes
SHA-256: b1c4d16762bc5b036ebe32247cb783ddc6e7212aa34686166f8f25080ab32b97

Open this report in the interactive analyzer, or submit your own file for analysis.