Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7231328f2cdd239…

MALICIOUS

PDF

76.3 KB Created: 2021-03-10 07:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c0df68a69b1c87cf3251cbe724ff491f SHA-1: 242ebc3f36ebdbfd689e194819e8281ce6028dc0 SHA-256: d7231328f2cdd239367fbcd4c8a9d020c44b2d563239cfdb6c4ea7e1b19cdc70
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm used for phishing or distributing further malware. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/aws?utm_term=ft+450d+for+sale PDF link annotation
    • https://cdn.sqhk.co/gorokipo/Wqicqgh/15410373494.pdfIn PDF document text
    • http://derikibavuji.22web.org/how_to_do_the_surface_area_of_a_cuboid.pdfIn PDF document text
    • http://podjem2.club/ecg_feature_extraction_using_wavelet_transformr1snm.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/gihcUhj/yandex_mail_dns_settings.pdfIn PDF document text
    • http://pesale.pro/31030038190oynzb.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/amfhbSi/ddpai_mini3_car_dash_camera.pdfIn PDF document text
    • http://bluebadge-support.com/mojokasomuwdo4.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/fTJjfTH/44613386869.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/igixjiL/85058501556.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/hq4jii7/bombsquad_baseball_coupon_code.pdfIn PDF document text
    • https://cdn.sqhk.co/pelotuwew/jbihjiq/infinite_flight_flight_simulator_android.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/gdfihih/witumuvabezoxudakil.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/6WjeMgg/65350181902.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mubozezubudiz.rf.gd/hemstitch_percale_sheets.pdfIn PDF document text
    • https://680e7e7f-99bb-4309-8a01-ecc910dc7690.filesusr.com/ugd/717a42_4010e27693e242c797796fd2ed02b5dd.pdf?index=trueIn PDF document text
    • http://pimudovi.epizy.com/bootstrap_3_horizontal_form_multiple_columns.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_c3cb555ca0be4086be05fc3b1391662d.pdf?index=trueIn PDF document text
    • http://zivuvosiz.epizy.com/area_and_perimeter_formula_for_all_shapes_download.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_off0000ed18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED18 5208 bytes
SHA-256: c05aeeb346e7b8ef12d3a2491bd9925ea667ca14819a8a550fb075a05401eea9
font_01_sfnt_off0000fee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE9 10868 bytes
SHA-256: 6fef8161edc66986b896ccdabfed083fac1b2a32b9fc596e77753b4074ee5ff9

Open this report in the interactive analyzer, or submit your own file for analysis.