Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7dc4b7cc0299fb4…

MALICIOUS

PDF

81.2 KB Created: 2021-03-02 17:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d52e111952b5bcfe64a714f298837b0e SHA-1: ed051b1180bb30a2f780bc3d3c28b74549578f7d SHA-256: b7dc4b7cc0299fb4842e0841277b4d25b143c6d070638e062657afb160334793
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=what+to+look+for+when+buying+a+second+hand+hybrid+car PDF link annotation
    • http://fringigejy.site/sunbeam_bread_maker_model_5833_manualck499.pdfIn PDF document text
    • http://savadaqwe.space/delta_sigma_theta_moratoriumc2y29.pdfIn PDF document text
    • http://budonap.iblogger.org/nenov.pdfIn PDF document text
    • http://leledup.mypressonline.com/wafirozelukafose.pdfIn PDF document text
    • http://fastpeysistem.online/how_to_fix_samsung_dryer_not_heatingo67p1.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/magnus_chase_and_the_ship_of_the_dead_audiobook_free_download.pdfIn PDF document text
    • http://alifan.store/work_instructions_templatepstfx.pdfIn PDF document text
    • http://poroda.site/force_4g_lte_5g_4g_3g_2gkk02s.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/91863841242.pdfIn PDF document text
    • http://gilogaviteno.iblogger.org/88955991102.pdfIn PDF document text
    • http://bilkan.fun/magic_rampage_secret_areas_1-_2wzibb.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/nikagij.pdfIn PDF document text
    • http://tivewuba.iblogger.org/anbanavan_asaradhavan_adangadhavan_movie_video_songs.pdfIn PDF document text
    • http://macsk.space/quaker_old_fashioned_oatmeal_microwave_instructions674lw.pdfIn PDF document text
    • http://mif-smeh.space/gedusitedisinalscjt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sofiwige.rf.gd/accessing_and_ing_your_fb_information.pdfIn PDF document text
    • http://todamabofadufod.epizy.com/vawubewabirete.pdfIn PDF document text
    • http://zajepatexesa.epizy.com/the_decisive_moment_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/alien_shooter_2_computer_game.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/lezakaxonusazati.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/83638102043.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/74615290347.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/19283297682.pdfIn PDF document text
    • http://jotigosi.epizy.com/nirugemelivomefodagoreji.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_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 5692 bytes
SHA-256: 0706b52b39c6e9efc0f154aefc5fbad99ef21fd2a6a9c07f738e7ede4abc3c47
font_01_sfnt_off000111fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FE 10684 bytes
SHA-256: 13db5dcc50a3d9b3572b4344ad7cb1fcc34d95b27c5d5c434da2015045c409c2

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