Malicious PDF — malware analysis report

Static analysis result for SHA-256 416beab19a5cba94…

MALICIOUS

PDF

78.7 KB Created: 2021-03-04 18:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3265dd3e45a6abd292f87acaab8acd27 SHA-1: 92e2c85541ec20a6b53268f9e4791289c4865885 SHA-256: 416beab19a5cba94f0f8a9a951eb694df85f54b2b1bb1126dfccad3a3b4ad9bb
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting domains, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs indicates an attempt to direct the user to potentially harmful content. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://fokemale.ru/strik?utm_term=power+transformer+sizing+calculation+pdf PDF link annotation
    • https://cdn.sqhk.co/pumevigatare/aghihmG/gumball_and_darwin_new_voice_actors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499633/normal_603e80179bfcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_5fd87635653df.pdfIn PDF document text
    • http://eroganoficial.site/situational_interview_questions_and_answers_for_teachersx6ows.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501046/normal_60245e0e1a528.pdfIn PDF document text
    • https://cdn.sqhk.co/kopakezoxek/gijjhcH/dude_perfect_videos_stereotypes_softball.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/UgcKij5/bmc_bikes_for_sale_south_africa.pdfIn PDF document text
    • http://allerop.xyz/vagasozukisomigixepivat0pqz.pdfIn PDF document text
    • https://cdn.sqhk.co/femokuxajuz/ioGifH1/ninja_blender_hot_soup_recipes.pdfIn PDF document text
    • http://bifokagomasema.iblogger.org/vifefabejekifi.pdfIn PDF document text
    • http://fresh-ita.space/kinodavuwenerenixukedosgnfrl.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/1NXjhgc/bts_galaxy_wallpaper_desktop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459482/normal_5fc6205f2bb3b.pdfIn PDF document text
    • http://itwomen.space/gasedajazu68x1h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lusiromipu.epizy.com/revista_da_natura_em.pdfIn PDF document text
    • http://pusolegulijased.rf.gd/zogibifefododirosubab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ee07d4-df7e-4366-8c46-873e814e54e2/juegos_friv_2018_del_hombre_araa.pdfIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_2302e640339841ba935d10f887d2d7bc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a078cdc7-bb1f-4842-a4e4-ebd33ec0440f/bizipepuxumipef.pdfIn PDF document text
    • http://fofuxolisemaxim.epizy.com/dosulegat.pdfIn PDF document text
    • http://zubikexef.rf.gd/toastmasters_general_evaluator_report_form.pdfIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_20916258670540338745e31b9d595254.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DA 5500 bytes
SHA-256: 24e8ccd772baf99e74269766a531496307e55a3e048a2a8d80ef652a330411f1
font_01_sfnt_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 11044 bytes
SHA-256: 0e0590f3a14d02ab2fd532da41b70c075c3bd956992fb356b00070649ae56f2a
font_02_sfnt_off00011f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F14 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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