Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd71fad024fe4c7…

MALICIOUS

PDF

79.0 KB Created: 2021-02-25 12:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1e216670da26ff249b363cc1bf40be2c SHA-1: 7f9824328c443f00e6c7c11da320cd36b19ceebd SHA-256: 1dd71fad024fe4c722ab681f42201b3b5d0bf9576820c27f4c959c65948f85bb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 probability of malicious intent. It contains a large number of external links, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate that the primary function is to redirect users to potentially harmful external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=2019+ford+f350+owners+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/medugagoviji/ftMhb8y/best_daily_planner_app_windows.pdfIn PDF document text
    • https://sunudufexune.weebly.com/uploads/1/3/0/8/130874439/efa8dde4e64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456165/normal_601794777f426.pdfIn PDF document text
    • https://rinezafuwokof.weebly.com/uploads/1/3/1/4/131437641/6304629.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/6ie0iba/starfall_calendar_october_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fcba9e02d295.pdfIn PDF document text
    • https://fimulumalopa.weebly.com/uploads/1/3/5/3/135326017/debugi.pdfIn PDF document text
    • http://taygerr.com/jack_lalannes_power_juicer_express_priceoardq.pdfIn PDF document text
    • http://myfavoritesun.xyz/cuanto_equivale_un_decimetro_en_centimetros4hdjh.pdfIn PDF document text
    • http://jibitivi.66ghz.com/bugulu.pdfIn PDF document text
    • https://cdn.sqhk.co/lunabati/JgekDjf/cross_stitching_vs_embroidery.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/jbngdjd/sharpener_cavetown_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_6011d6a92f9d1.pdfIn PDF document text
    • https://wemovimezatura.weebly.com/uploads/1/3/4/6/134611727/tunik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504641/normal_5fcaac8eb39e9.pdfIn PDF document text
    • http://myimperfectmomlife.com/93869763876rjphg.pdfIn PDF document text
    • http://omshop.space/190973990909x1r7.pdfIn PDF document text
    • https://cdn.sqhk.co/sezelijimofi/E16gge9/rapajuvuxinas.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/igyidjf/samsung_alpha_flex_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405903/normal_5fff4743cf8d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kowetomad.epizy.com/how_to_say_report_card_in_spanish.pdfIn PDF document text
    • http://wafubarig.epizy.com/annamalai_university_dde_convocation_application_form.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_off0000f5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A2 5956 bytes
SHA-256: 9a0586e7723fe8ba64e6adbc39314b0af14840b33f55d4410474a49a1031869b
font_01_sfnt_off000109e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E5 11040 bytes
SHA-256: 0b47a262f54db100b1f5ed6370d3f8995217704a715a929d86fba68600052380

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