Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b25648758153da…

MALICIOUS

PDF

81.5 KB Created: 2021-03-25 08:43:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ac456239b0aef13b929b266eedd337d2 SHA-1: 1c39b69e76e93de5c4ef4d309efd67ea9dbdc8fe SHA-256: a0b25648758153dab69bceb8cf960d06524880de5829a8436122357c251a6959
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically targeting a search query for an access code, suggesting a phishing or credential harvesting attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links on disposable hosting, further supporting a malicious intent to distribute malicious content or phish users. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/strik?utm_term=hoyle+advanced+accounting+13th+edition+access+code PDF link annotation
    • http://mibemuxagegija.mywebcommunity.org/what_should_a_personal_statement_for_university_include.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/domudubowi.pdfIn PDF document text
    • https://moxitamun.weebly.com/uploads/1/3/4/0/134040854/repovoxevev.pdfIn PDF document text
    • https://suxomosiwe.weebly.com/uploads/1/3/4/3/134350922/mosigizaze_muzazorevifurin_biwazobeda.pdfIn PDF document text
    • http://banquepopulaire-fr.org/rowurigajemomoie3m4.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/what_can_you_cook_in_a_6_quart_pressure_cookersnojy.pdfIn PDF document text
    • http://rankingcoach-seo.com/5010631899fo5ne.pdfIn PDF document text
    • http://caterm.ru/bibumukfrdgm.pdfIn PDF document text
    • http://mesutilixuta.sportsontheweb.net/canon_mx300_ink_cartridge_change.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/e56dc2b.pdfIn PDF document text
    • http://foyou.store/microsoft_word_golf_tournament_flyer_templatea12h1.pdfIn PDF document text
    • https://xajakubadom.weebly.com/uploads/1/3/0/8/130874473/3639030.pdfIn PDF document text
    • http://xufikefizot.sportsontheweb.net/sorenaxexas.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/0bb599ae-794d-4bf5-b1dc-7014db756de1/gosegasiguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efea6b5d-68df-43fc-914a-b466aafba70e/epson_wf_2540_paper_jam_error_no_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d752bcd7-01e8-47e0-9d43-ffed02664f58/the_other_side_of_heaven_2001_izle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3655db-d656-468c-8d45-7c7c6e49203c/scotsman_prodigy_plus_descale.pdfIn PDF document text
    • http://wedojixote.rf.gd/magoosh_1000_gre_words_free_download.pdfIn PDF document text
    • http://lalemifeluruka.epizy.com/58633824182.pdfIn PDF document text
    • http://xujiwusa.epizy.com/27062346016.pdfIn PDF document text
    • http://xidalagep.myartsonline.com/sulagamafadoxuxevusox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf154f4-2718-44d3-a662-a1cd43f280aa/durepivuwe.pdfIn PDF document text
    • http://tosipasakuvil.myartsonline.com/52283649697.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D4 5444 bytes
SHA-256: b348240ff63ab0ec54fcf9326344d570cb223ceec9caa3c78a85ecba2e9ace16
font_01_sfnt_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 12048 bytes
SHA-256: 0f6236383cffc24230d5de85f08f1a3cfc01aafdda484c30a7463a01dea0bc15
font_02_sfnt_off00012305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12305 16084 bytes
SHA-256: 29b8095464fa9501f2379a4c43ca3ba1b1df604f87f2abcbe11fa9bdafb8ec10