Malicious PDF — malware analysis report

Static analysis result for SHA-256 672d9535c251c407…

MALICIOUS

PDF

77.7 KB Created: 2021-03-21 04:35:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e13865cd028dcb056c622cbf4cfa3243 SHA-1: 20467883b2e4ec4421f703a4110772e8cc397325 SHA-256: 672d9535c251c40721d1f50d660dd8902d4da8028130cf1bd7a72c309269dbf1
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=lady+gaga+bradley+cooper+shallow+live+performance PDF link annotation
    • http://melowimaz.getenjoyment.net/liverudibijajelesosano.pdfIn PDF document text
    • http://copyrightproblem.com/que_significa_adviento_para_los_cristianose9vrq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5fcc013feabe1.pdfIn PDF document text
    • http://fakaripeti.xyz/gurps_basic_set_characters_fourth_ed3paw8.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/FhdID8s/head_ball_soccer_world_cup_2014.pdfIn PDF document text
    • http://fesufobototezer.mywebcommunity.org/ashutosh_mukherjee.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/16903094115.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/fAjghgB/wekorurifafi.pdfIn PDF document text
    • http://dakekunagefasak.sportsontheweb.net/43666302704.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/jbZ4jiF/lep_s_world_3_gra_online.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/vevabagazab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5fd930e85835a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_6011516a65e89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390323/normal_5fc75a91c8a48.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/9IEFhh3/jutafakuzudab.pdfIn PDF document text
    • http://easylearning.space/18809993763sor5h.pdfIn PDF document text
    • http://ig-mediateam.net/forgotten_realms_gods_of_deathrhhs3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402000/normal_6021296c1204f.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/08c743ff-633b-407d-ad14-a7a914c126c3/gidexisen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04ed8b5-3302-4be3-83f6-41103780edb4/defining_black_feminist_thought_patricia_hill_collins.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/acer_iconia_tab_a200_replacement_digitizer.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_off0000ecd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD4 5904 bytes
SHA-256: 4ef3f3a644ff1e439870a0fa074d96c9a2b9afe97d0579ae74b0c51f6ef2e487
font_01_sfnt_off000100e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E4 11392 bytes
SHA-256: 0ae6f36fed3ab221b2ca0b7aa1b9923b2e20b6d43052252312138fa45649df87

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