Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a562618ad3ff7c…

MALICIOUS

PDF

74.2 KB Created: 2021-03-01 14:50:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f94aad3b9899656fe91315c40d0a42cc SHA-1: ab090f49f1ea2913dae9fb29209428bd6effc3c2 SHA-256: 20a562618ad3ff7c4d5b10d2df0f0bf6a36eb3de751caaa833e51a787394856e
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, a common tactic for phishing or malware distribution. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful sites.

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://seumenha.ru/award?keyword=solar+umbrella+house PDF link annotation
    • http://lamovingcompany.com/que_dias_es_feriado_en_diciembre_2020ifwht.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/dadapo.pdfIn PDF document text
    • https://buderenedisam.weebly.com/uploads/1/3/5/3/135302361/3150413.pdfIn PDF document text
    • http://sukuwodexi.scienceontheweb.net/rademacher_topics_in_analytic_number_theory.pdfIn PDF document text
    • https://ludolukek.weebly.com/uploads/1/3/4/6/134699908/runaredi_jijofiganarogu_vasiwelase.pdfIn PDF document text
    • http://maslovauto.ru/walafaxedasufenapgqrfb.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/gubazirigepizazi.pdfIn PDF document text
    • http://naderuromopuru.22web.org/ramuwenopupenidol.pdfIn PDF document text
    • http://ejinaya.com/knockout_fall_guys_royale_3d_calculationp9fd1.pdfIn PDF document text
    • http://pidanukiziteko.22web.org/anton_chekhov_complete_short_stories.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/wunovisaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/cYhibhh/screen_recorder_app_for_iphone_5.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/j72hgZL/brave_frontier_2_dark_units.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/hjZiggj/best_fishing_spots_near_me_no_boat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wamigorudazuz.epizy.com/sefuwimekefid.pdfIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/measuring_and_classifying_angles_worksheet_answers.pdfIn PDF document text
    • http://bugibek.rf.gd/ffxiv_crafting_leveling_guide_1-_80.pdfIn PDF document text
    • http://punolubumima.epizy.com/jozufosam.pdfIn PDF document text
    • http://poziluxolebulu.epizy.com/99141063729.pdfIn PDF document text
    • http://losisotudek.epizy.com/fetiwatobegokok.pdfIn PDF document text
    • http://guvoperar.epizy.com/45903984792.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_off0000e5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FB 5168 bytes
SHA-256: dab08855153f838c6b7c76256799bad9e465c1a746e05a7645317b87bb1ee0b0
font_01_sfnt_off0000f75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 10876 bytes
SHA-256: 44b4088fa60443d5939eaacc173fa54747330e262d66ed639b3576ed629dfc82

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