Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce4417b3cb79348…

MALICIOUS

PDF

82.9 KB Created: 2021-05-03 19:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 69a3b6e8173d786e092fc97733efbbed SHA-1: 4b96967d47e70ad079748780f4c740d6df2b4249 SHA-256: 8ce4417b3cb793480c5cdb36712175e291aae03dd9fd83f6bfb8b2e2ec1b292b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content or phishing sites. The PDF structure and embedded links are consistent with a phishing campaign designed to exploit user curiosity or urgency.

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://baarspo.ru/strik?utm_term=polaris+trail+boss+250+4x4+review PDF link annotation
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/siritosozirak-durubomuwufo-sozenemabulorel.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/mind_games_to_play_when_bored_at_worklk908.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/kexazikotujuni-kawujakolike-gizuwa-pidopitesev.pdfIn PDF document text
    • https://vepiniripalur.weebly.com/uploads/1/3/4/2/134235349/romaritoropazo-vavavi-tumozemogup.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/uhaPgjX/fire_alarm_testing_report_format.pdfIn PDF document text
    • http://genusadnlo.space/95660202300fmbgm.pdfIn PDF document text
    • http://vuvodagedene.scienceontheweb.net/pearl_harbor_facts.pdfIn PDF document text
    • https://cdn.sqhk.co/sirijunubi/hgARidq/tiwovokukemogadav.pdfIn PDF document text
    • http://merotudonor.mypressonline.com/surface_anatomy_of_abdomen.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/algorithm_design_and_applications_goodrich_solutions.pdfIn PDF document text
    • http://psylath.com/99591273406k3f8u.pdfIn PDF document text
    • http://nawabopebi.iblogger.org/dikitanekotukirisu.pdfIn PDF document text
    • http://siwupezomejen.getenjoyment.net/mirozivelo.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/bf7c70e5-0003-4b91-ac9f-412dbe23885e/buketafujoloxemimexepawe.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/death_of_ivan_ilyich_themes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80952a6f-87d6-4730-b31e-5b769e5d16be/60561782235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a01bcd5-aa5a-4935-a998-6ee34e7ee43f/can_lawyers_work_internationally.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf11cdc-5c8e-4084-8e97-16274b4576c4/50746749599.pdfIn PDF document text
    • http://vevenamefod.epizy.com/42486869081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff6d4474-256a-4baa-8461-e90477127e37/2003_mercury_225_efi_weight.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_off0001033d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033D 5528 bytes
SHA-256: 4f7d9f1aeca8862577b96b63d4aefb30534e8d5de4f484321b55e8d1a780086b
font_01_sfnt_off00011636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11636 11708 bytes
SHA-256: 87a28aa4f5cd943c95fc3634f304e713d4ceb193876ec8e8edd1574f10094785

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