Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d66fe003b2ca6e1…

MALICIOUS

PDF

155.2 KB Created: 2021-03-30 00:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 70b5d39407f769f041f578f933c94fcb SHA-1: 623606ad387e584424f8770c2e50bb5fc8ce3530 SHA-256: 1d66fe003b2ca6e1a3f21e5e3d693afb2393c5b9d4399f4bcccc29d52a518a52
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics indicate the PDF acts as a link farm, hosting numerous links to external websites, many of which are on disposable domains. While no scripts were extracted, the presence of many external URLs suggests a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://druttle.ru/award?keyword=sx+asperger+pdf PDF link annotation
    • http://prodive.su/can_you_shoot_5.56_in_a_223_mini_14ij5oo.pdfIn PDF document text
    • https://ligavovifoma.weebly.com/uploads/1/3/4/5/134522072/1290095.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/ibgdibK/ravalegelaw.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/ohi9iaK/car_crash_this_morning_melbourne.pdfIn PDF document text
    • https://cdn.sqhk.co/maxanogefo/hiZjeRj/ardas_kara_punjabi_movie_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/igfgfec/bekivuno.pdfIn PDF document text
    • http://whalesqpa.fun/suxezumokewekaboyddhv.pdfIn PDF document text
    • https://natitapa.weebly.com/uploads/1/3/1/3/131379406/f8520b393c5.pdfIn PDF document text
    • https://jarofipe.weebly.com/uploads/1/3/1/4/131408229/vunanapa.pdfIn PDF document text
    • http://tudagizix.22web.org/86931649391.pdfIn PDF document text
    • http://keysecret.ru/xamifivototana7xo63.pdfIn PDF document text
    • https://papizutexoda.weebly.com/uploads/1/3/0/9/130969148/06013b1.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/vRoFhhK/word_on_fire_institute_principles.pdfIn PDF document text
    • http://ca-management.website/difference_between_emulsion_and_suspension58smo.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/ff53b288-eb8f-461f-bf53-0d1720bb79aa/rasugawavavisibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fafc92e-d750-4a0e-96a5-5b009a1e4db3/fun_narrative_writing_prompts_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/27689030834.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/fulesaweroliti.pdfIn PDF document text
    • http://zaxesagujudiwa.epizy.com/81624012637.pdfIn PDF document text
    • http://pamemoroza.epizy.com/pulagefokumekaxefu.pdfIn PDF document text
    • http://salalew.epizy.com/supply_chain_management_and_logistics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1840b0fa-beb8-419d-898e-ea586a31a4d6/how_to_combine_files_in_foxit_phantom.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_off00021ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21FF1 5348 bytes
SHA-256: ae4a759b377b4dac03ac2e1697903d21094190d83c4a1721b5b558af6c925bdb
font_01_sfnt_off00023237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23237 13652 bytes
SHA-256: 1647dff9fdb431b0c4e11909448b00f552b7c52ca17f4fa48fc6a0ccadf4b303

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