Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fdb9f3f4fe75a84…

MALICIOUS

PDF

98.1 KB Created: 2021-04-24 15:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 58a4e72ac19cbe7195b4c52973ec2ec1 SHA-1: 7d05d189bca5bd247922a97da561bbf853b736da SHA-256: 4fdb9f3f4fe75a840f5aca4727610d2b713e4ebfd3cc74ff57cf66dd0ec8535b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/strik?utm_term=does+traxxas+t+maxx+3.3+have+reverse PDF link annotation
    • https://kenomuxi.weebly.com/uploads/1/3/4/0/134042647/raluwoveragoni.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/konis_pizolugofusepew_tonuwetadojavu_gomudikos.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/livro_palavras_cruzadas_coquetel_para_imprimir.pdfIn PDF document text
    • http://beguwidip.scienceontheweb.net/bescherelle_grammaire_francais.pdfIn PDF document text
    • https://geregilewupune.weebly.com/uploads/1/3/4/8/134849809/839d0089b7.pdfIn PDF document text
    • http://disupiwalu.mypressonline.com/libro_de_bacteriologia_y_micologia_veterinaria.pdfIn PDF document text
    • http://bestcreditcheck.info/what_did_the_clock_symbolize_in_the_masque_of_the_red_deathh09uh.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/44576642541.pdfIn PDF document text
    • http://jomosukadakad.iblogger.org/mewolapa.pdfIn PDF document text
    • http://rokuboxajiga.medianewsonline.com/ca_inter_books.pdfIn PDF document text
    • http://gdztut.com/rijezogvd5h1.pdfIn PDF document text
    • http://huseyincanx.com/804786695804kalf.pdfIn PDF document text
    • https://xoluvaxabezil.weebly.com/uploads/1/3/4/3/134338990/edce2332fec672.pdfIn PDF document text
    • http://com-servers.online/what_are_different_types_of_version_control_systemsajdd3.pdfIn PDF document text
    • http://xulonagubalipa.66ghz.com/important_current_affairs_of_april_2018.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
    • https://s3.amazonaws.com/lanaladu/12004711763.pdfIn PDF document text
    • http://gomugugagaf.onlinewebshop.net/dell_poweredge_r440_server_datasheet.pdfIn PDF document text
    • http://bovaxibeloxev.rf.gd/brastemp_inverse_manual.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/xuragatamakoz.pdfIn PDF document text
    • http://teropisarazo.myartsonline.com/16205344857.pdfIn PDF document text
    • http://zutezirupatot.rf.gd/beatspot_75k_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/64333885299.pdfIn PDF document text
    • http://nokizotef.rf.gd/body_for_life_workout_sheets_lower_body.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13470 4848 bytes
SHA-256: 0751aa96e33b4a5ec2c2b1647e2d0f7c9b0f1eb0972d63a4e348aaf26837c0ee
font_01_sfnt_off000144f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144F0 11628 bytes
SHA-256: 9abda97d5984efd6e7f2a0e70c074ac5e008d38d8991be616268c677673dbee6
font_02_sfnt_off00016c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C86 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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