Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab8a2d4834e9b97…

MALICIOUS

PDF

75.6 KB Created: 2021-04-01 23:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 04ea5e18f9593c6b7aa159152c348f9e SHA-1: be18dbf5d31b13ca0dfd12d5a11d42d4cdc7a579 SHA-256: 1ab8a2d4834e9b97ed8d03a14da9e09382bb590809f33d61a72830ea87d03da4
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and a link farm heuristic strongly points towards a phishing or content redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=2012+dodge+avenger+rt+top+speed PDF link annotation
    • https://bomegudezami.weebly.com/uploads/1/3/1/0/131070148/7962982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_60519b4d6b62e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416321/normal_5fd7e7a8f2068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_603412cd5995c.pdfIn PDF document text
    • https://nomikevokatipo.weebly.com/uploads/1/3/1/8/131859895/fenetemavisug_ruduwa_babirod.pdfIn PDF document text
    • http://fullstacket.online/sccm_osd_task_sequence_log_locationqmxhj.pdfIn PDF document text
    • http://keksik24.ru/76471602920bw12v.pdfIn PDF document text
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/a4167c271917.pdfIn PDF document text
    • https://gadebalemalun.weebly.com/uploads/1/3/4/4/134443756/633b5aab64f344f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382972/normal_60203c1aa6c73.pdfIn PDF document text
    • https://xutogimumunode.weebly.com/uploads/1/3/4/3/134375265/zepeka.pdfIn PDF document text
    • http://torchland.xyz/iphone_11_pro_stuck_in_guided_accessn0qzq.pdfIn PDF document text
    • http://3203epworthcres.com/mansons_tropical_diseases_21st_edition_free_downloadp950j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://petizitopebil.epizy.com/kekamosen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832dd0cc-eece-42bb-adc4-2c686f0a8689/are_bison_stronger_than_buffalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037ac975-38b2-43a2-ac72-fd303b8bd967/refer_to_figure_6-18._the_per-unit_burden_of_the_tax_on_sellers_is.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2742b8f-5164-42a5-af73-5ab7bdc5e053/the_leftovers_plot_season_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbabfa8-60bb-468c-ad04-46ff9ca07c0f/less_than_zero_book_review_ny_times.pdfIn PDF document text
    • http://meperaxatexuwib.epizy.com/mutimukogok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a32ebcf-c173-4c0b-b293-b0bcab188dab/jutulatagu.pdfIn PDF document text
    • http://jikudifotiwobij.epizy.com/negative_number_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a844620a-4058-41c4-a22f-18185b84b3ca/el_formato_apa_lleva_numero_de_pagina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609800fe-b5ce-4300-8db6-c6ea9c82091c/zalutututuzuwuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd4e5c3-b737-4998-b21d-2c6097941db4/12466492021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d355d13-af7d-4550-a22c-a36d44db199e/1761705145.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_off0000e92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 5384 bytes
SHA-256: dba6f4c0544bfb06435857b86085202e75dbc5c5c2fe93229d1d84ba7af708c9
font_01_sfnt_off0000fb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB98 10940 bytes
SHA-256: af8f3843d2dde89b754c7fe14de7e23c95f10dc848286165c35af5cd055f3e2f

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