Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1ae62f9b37876e…

MALICIOUS

PDF

79.7 KB Created: 2021-04-02 18:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1b3f1aef00e6bcde47d9065e7a862943 SHA-1: 9f503f3e5998f3e7edcdda71ce7c6a1afacae040 SHA-256: 9d1ae62f9b37876eaa6542e7e22fa013c186fd2f55af62c0455076e69e62ebcf
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/strik?utm_term=best+glute+resistance+bands+on+amazon PDF link annotation
    • http://hesap-al-sat.com/wawoxizapzeh14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451208/normal_601ed27080055.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/688936973glhpq.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/how_to_replace_a_honeywell_alarm_battery.pdfIn PDF document text
    • http://bamupiwabibajew.mywebcommunity.org/sharepoint_2013_cumulative_update_september_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_6018bf909e3cc.pdfIn PDF document text
    • http://dufigep.scienceontheweb.net/adobe_acrobat_reader_append.pdfIn PDF document text
    • http://loxupuf.mygamesonline.org/biwesadazajikeva.pdfIn PDF document text
    • https://cdn.sqhk.co/denugesugumu/hhjdie4/hackers_falls_swimming_hole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_6040212f21c83.pdfIn PDF document text
    • http://vipmanmarket.space/harmonize_niteke_song_videojxfpp.pdfIn PDF document text
    • http://tuwimig.scienceontheweb.net/dobasadujujijil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496810/normal_5ff3e4d45bbfb.pdfIn PDF document text
    • http://ranking-se.com/how_to_replace_heating_element_in_kenmore_dishwasher1ikgw.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/dTXNKoj/speed_game_hacker.pdfIn PDF document text
    • http://zaliv2k20wowowowoow.xyz/oconee_state_park_directionsa78lv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_604d4d6b49971.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/final_fantasy_8_official_strategy_guide_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_57226304b46f42acb410e4fc82d838f4.pdf?index=trueIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/74980821077.pdfIn PDF document text
    • https://035e1e53-160b-41c9-b88a-fae10e05dc6c.filesusr.com/ugd/7dd30d_a3dc458b65ac40e6b34ff85fb9ce5b5a.pdf?index=trueIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_ff50546744d546cbae18d698dbddc7a1.pdf?index=trueIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_5d07f18952074f0a947128558d704115.pdf?index=trueIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/lipolevabijiretaj.pdfIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_4f1324e66e1f41de81b36d3ee225557a.pdf?index=trueIn 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_off0000f607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF607 5500 bytes
SHA-256: 4c9bb7a63b3dcd84400391ed05e0f88ef62b73d747ef1992579c94f831efe9ac
font_01_sfnt_off000108ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AB 11840 bytes
SHA-256: ffea36712e058bd558ec85ff7206a630172f430daedd15b4f620cda98dcd1d17