Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ccd24cb2ea714e…

MALICIOUS

PDF

86.2 KB Created: 2021-04-03 22:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 96d39d296b9fe973611d66bc5cd244d4 SHA-1: c294e4761341035467236d47100699d12e965d32 SHA-256: 87ccd24cb2ea714eb60bda5155c9f5039f58cf72db263028c122532fa10876e1
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=vidmate+mod+apk++free+for+android PDF link annotation
    • https://gurufikenifa.weebly.com/uploads/1/3/2/3/132303388/3236509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_6032562ed5398.pdfIn PDF document text
    • http://lojisaka.22web.org/list_of_autobiography_books.pdfIn PDF document text
    • https://laxuwipulave.weebly.com/uploads/1/3/5/9/135956831/6029825.pdfIn PDF document text
    • http://mutinujevax.22web.org/drama_cambrian_period_drakorindo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_601f4111c0f17.pdfIn PDF document text
    • http://milesnires.xyz/garafesiwewu3rria.pdfIn PDF document text
    • http://songkfrk.site/41502988478m77wk.pdfIn PDF document text
    • http://guwapudowi.22web.org/22802895569.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/a1b1791a-555d-4c5c-8ada-1f45dd4e68e1/what_are_the_requirements_for_college_admission.pdfIn PDF document text
    • http://dikivila.epizy.com/febobenubusedobixeruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ee18e2b-64ae-42d3-9b6e-e23b012cab06/79074161695.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/how_to_activate_pa-ebt_card_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/grim_dawn_cabalist_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/xegelawiwafewivuxinuxot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325eeae0-3934-4772-a607-6e480f5bcbf9/92908840959.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/binomial_probability_distribution_calculator_ti_84_plus.pdfIn PDF document text
    • http://kezulixu.rf.gd/ligifarufaxoniga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d921027-9801-428a-852a-ce08fd8fc3e5/facebook_help_desk_number_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd38cdf-5db4-496c-950d-5c4f89b43fa1/samsung_galaxy_s9_plus_case_amazon.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA73 2952 bytes
SHA-256: 6f6c5a8fb5e62cfd2b6ff76f758e0f05a98695d5bac735cd019a42cb5e5649ba
font_01_sfnt_off0000f500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF500 5004 bytes
SHA-256: a3e14bc1bff1c0b13b0a049613ed72b23707745d729817fde4c7918eef0a1bab
font_02_sfnt_off000105fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FB 20544 bytes
SHA-256: 164963c71d48a690f2e3fffff740f5232f5ac0885e0c09989650e6b0e9ffc4af
font_03_sfnt_off00013611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13611 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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