Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a715ebc7ef80eec…

MALICIOUS

PDF

76.2 KB Created: 2021-03-26 16:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3172aec368370ae55ade5cc9b9ca2514 SHA-1: 2b3eda62f45030ac9f7f9ba9956572965378e8c7 SHA-256: 0a715ebc7ef80eecb47ca3be435675247cd6a070f27476354bea3c53525cfc17
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically identified as a phishing or trojan threat. The embedded URLs and the heuristic indicating a link farm on disposable hosting suggest the primary purpose is to redirect users to malicious websites. No scripts were extracted, but the PDF structure itself is leveraged for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=report+writing+on+founders+day+celebration PDF link annotation
    • https://cdn.sqhk.co/vopupevomate/gifb69I/sogadakajevovan.pdfIn PDF document text
    • http://gumoximowukowot.iblogger.org/cost_accounting_glossary.pdfIn PDF document text
    • http://design-kvartira.info/battery_operated_outdoor_christmas_lights_with_timer_ebayexg9c.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/hRvsgfg/diy_handmade_soap_cutting_knife.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/84974181601.pdfIn PDF document text
    • http://itmax.info/tepokoxonimefukafoj4xmr.pdfIn PDF document text
    • http://alifan.store/how_to_make_a_lady_fall_in_love_with_you_onlinezea3k.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/wSijND6/baldi_s_basics_classic_no_download.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/641ef801-9eca-40ec-8dfc-5866788e7aef/logukag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6480bee-6362-4ef2-ab60-7a7ad35513e5/linebacker_drills_and_techniques.pdfIn PDF document text
    • http://tujetonub.epizy.com/wasivaxaxufeto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c08cf9-d53d-4f24-983e-e88a9ab53fbe/1988_skamper_pop_up_camper_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36504591-1e86-482e-b596-4416d0d99dcf/sibevovinijilekofop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c57de43-a987-49a3-be24-76504b1bdbdf/2455181099.pdfIn PDF document text
    • http://sufimajedunof.epizy.com/15808829392.pdfIn PDF document text
    • http://movafomuwexowix.epizy.com/distance_and_displacement_practice_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431c8d0e-3d6c-4917-af0c-88ae0e9dd964/zozunagadelokukozer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0258a88e-b91c-450a-8a31-ffec6de1693a/blood_bowl_2_shop_codes.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/66771669626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99554b5f-b0cc-4e00-9b03-f4715048ec84/totunapigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5ee33e-8a56-4946-9fdf-b2620a0c5cb2/47282186588.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_off0000ecc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 5664 bytes
SHA-256: 1cbd2a325ad365df7e92a125dfaca3d976f67fc348eb19ba95ff80616a6cf5b8
font_01_sfnt_off00010036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10036 10272 bytes
SHA-256: d130e15dd493efb510e8eab15875ee5a1dcead1c45ba029f834c7280a16cad03

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