Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72de2d93f6dc2cb…

MALICIOUS

PDF

89.8 KB Created: 2021-05-03 13:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ed7b731d2ad5485fe02a16df5e5d0fdc SHA-1: 0379f02c3eff4e45b2745afe9e7c131a843729f6 SHA-256: d72de2d93f6dc2cb62406d795e33abdfb0be5fc6da4730558523ee9f5a53edc7
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://mezovuduw.ru/strik?utm_term=appreciate+the+history+of+art+in+the+philippines PDF link annotation
    • https://tezenilul.weebly.com/uploads/1/3/6/0/136085996/kekijemapaxovo.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/fhaxbJ4/bovinupev.pdfIn PDF document text
    • http://tofugezupeb.mygamesonline.org/mizikal.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/jfSheke/wish_apple_watch_6.pdfIn PDF document text
    • https://rakositove.weebly.com/uploads/1/3/4/5/134595637/39fc94ba7bf13bf.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/18pqjiE/93106423069.pdfIn PDF document text
    • http://sudiwemubitep.22web.org/81080942070.pdfIn PDF document text
    • http://gixofufivexofu.iblogger.org/nopibar.pdfIn PDF document text
    • https://xopezafetuwov.weebly.com/uploads/1/3/5/3/135314897/dd1b7eea395cfc4.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/morexekazubijofowomoru.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/what_is_the_difference_between_grand_piano_and_upright_piano.pdfIn PDF document text
    • http://kijumubafenu.mypressonline.com/what_i_wish_i_d_known_before_marriage.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/5nUvjUV/call_record_of_any_mobile_number.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/lsDggjg/1946569010.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewetanetoza.atwebpages.com/gatedaridujuzufev.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/what_is_the_bolt_pattern_on_a_2000_jeep_grand_cherokee.pdfIn PDF document text
    • http://pupiloxesafefiz.epizy.com/wix_adding_header_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b668f9b-2988-44f8-b710-d85fff805906/tibunutenuvul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71a510c-ffe9-4b27-a941-387c9c304147/the_new_first_dictionary_of_cultural_literacy.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/apartment_address_format_in_spain.pdfIn PDF document text
    • http://natunolujekusi.epizy.com/applications_of_mathematics_in_geology.pdfIn PDF document text
    • http://pikididubemet.epizy.com/43388490343.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/70176681520.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/zetefotadedaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a4a556-6a3f-4c76-a779-878b6c16e810/scooters_repair_paris.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/34637749064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/460b6721-8d80-4b87-b599-808e0390e5b7/60723466734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35d1c47-06a8-400a-a26e-0b96674f868c/gajasiduxereniliditujafo.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_off00011f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F53 5192 bytes
SHA-256: a313f9df9ce205040d02cf7679306f1d3db8a361772b23aff1f3b385529c5142
font_01_sfnt_off00013106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13106 11164 bytes
SHA-256: cea7842ac48a95ce171c1fc7539392e0efc0e2963e88a620351d0cdd9242b30b