Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c9e46e0b003e51…

MALICIOUS

PDF

104.1 KB Created: 2021-04-29 15:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 39584e6ac4c9c188dcdc41d78b6ca724 SHA-1: 1a2f75d116695f925f7d8dbe71b05e67029a4072 SHA-256: e2c9e46e0b003e51140f6a1d47f5cc945ef5fd8a57217ac76b0c30907a0dde93
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to a URL that appears to be part of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=burley+d%2527lite+assembly+instructions PDF link annotation
    • http://vivekawiga.sportsontheweb.net/antigona_analiza.pdfIn PDF document text
    • http://fresh-ita.fun/purafalowvz14q.pdfIn PDF document text
    • https://xukusoresi.weebly.com/uploads/1/3/4/4/134488105/bawidovabumot.pdfIn PDF document text
    • https://pigukoziluluz.weebly.com/uploads/1/3/4/8/134896600/xurenomobopukekonolo.pdfIn PDF document text
    • http://lordtrans.ru/mcdonalds_crew_trainer_study_guidem0jpp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xurosuforudev.atwebpages.com/44312390832.pdfIn PDF document text
    • http://mifumupesa.rf.gd/atahualpa_yupanqui_poemas.pdfIn PDF document text
    • http://namerunu.rf.gd/25454509182.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/wavemukuvipujulupaso.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/27014505953.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/36363266072.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/minecraft_chernobyl_map.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/schumacher_battery_charger_xc10_manual.pdfIn PDF document text
    • http://luwawabegopit.rf.gd/cisco_ise_hardware_ordering_guide.pdfIn PDF document text
    • http://ketonabewuzove.epizy.com/zizimivano.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/15326631385.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_off00013c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C10 5412 bytes
SHA-256: 54bb2f34e999d28cd2898dfba59753d6ff45ff13d24aff2079c9af2c943c7a33
font_01_sfnt_off00014e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6A 13496 bytes
SHA-256: 07a55c211083c48e16e9e892ca214e12a3cf8e3bb2e5b4a5a774cec086629ac7
font_02_sfnt_off00017afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AFA 16376 bytes
SHA-256: 9d4a781db2fc5b835a9600973b28615f03bf0f4d54fc047d60fc9c5364426238

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