Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe3f7f97f9994ac…

MALICIOUS

PDF

68.5 KB Created: 2020-12-20 07:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 023d9d11b6e82fc5baec51dfd06a4d65 SHA-1: b482c9a4d72aac144eaae03f6d4ce2c6d7ce4e1d SHA-256: 4fe3f7f97f9994acfc4a0b25612bcd8944b8e74f690caffb77a67105bbd05a61
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, indicating an attempt to distribute content or redirect users. The presence of an embedded URL pointing to 'trafficel.ru' suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and the nature of the heuristics strongly suggest malicious intent, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://trafficel.ru/aws?utm_term=ap+module+grade+7+teacher%2527+s+guide PDF link annotation
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/tugifasuv_podonegif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447912/normal_5fdae303516b1.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/d123e591-a222-4933-b8da-f24be0abc5a0/gogoxifozigilapikosojisi.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/minecraft_pc_unblocked_no.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/lewutovidawusodimakik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e4c9d71-ff8d-4bed-8bb3-b04429357602/moxie_salon__beauty_bar_montvale_nj.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/radujiwudimajefetetagazut.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/banner_template_publisher_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/jacquie_lawson_cards_member_login_in.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_off0000ce0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0C 5592 bytes
SHA-256: a5d6cb29a3771bc951a92b1fa09a501965842b1c8033bd46552b2b67e40dfb07
font_01_sfnt_off0000e0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F5 10776 bytes
SHA-256: 087efd3bf57efd88a1b1a1cc17fe0bb48e913f0efb3c228079264adcce52fb30