Malicious PDF — malware analysis report

Static analysis result for SHA-256 534c40edd9bcda7e…

MALICIOUS

PDF

79.4 KB Created: 2021-05-22 16:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0190b24c3000a2234a3c649f85cd0b53 SHA-1: aecfdfe6a53fb667b4214f7282786e23a3d6ab21 SHA-256: 534c40edd9bcda7eea409dc6226d64e3214973b25e563bd3afe33ef5abb3661d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. One of the primary external links, https://fokemale.ru/strik?utm_term=mecanica+dos+solos+e+suas+aplica%25C3%25A7%25C3%25B5es+volume+2+pdf, is flagged as a potential distribution point. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=mecanica+dos+solos+e+suas+aplica%25C3%25A7%25C3%25B5es+volume+2+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494673/normal_5fe06e07a6d7c.pdfIn PDF document text
    • https://pesuwoleze.weebly.com/uploads/1/3/5/2/135295903/90a737e28622200.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451551/normal_5fe2a3043087b.pdfIn PDF document text
    • https://niguzagum.weebly.com/uploads/1/3/5/3/135390192/nukawekolenuwif-gejeva-pejosade.pdfIn PDF document text
    • https://kowuzuworos.weebly.com/uploads/1/3/2/6/132682574/fiwaxowalavatofebaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383304/normal_5fc7f9ce4e64b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_5ff305ded42fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_605b77c173566.pdfIn PDF document text
    • https://bazeneta.weebly.com/uploads/1/3/0/8/130813787/xuzevireve-tewuro.pdfIn PDF document text
    • https://tesekagaz.weebly.com/uploads/1/3/4/3/134342497/vagagomeneretalow.pdfIn PDF document text
    • https://fodonisegijiwos.weebly.com/uploads/1/3/1/4/131437376/9694388.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/390f30f7-2941-49e6-8f74-8f4d56e9ea16/folibilolegiritasitidogix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9724245-4546-42ae-b3a3-c9e1592c3873/how_to_adjust_time_on_g-shock_digital.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/are_el_pollo_loco_keto_tacos_really_keto_friendly.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/how_to_repair_proform_treadmill_incline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef05f921-fc85-4c2e-adb9-0b37e60719c9/kitedefiwokutujugepik.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/oh_baby_telugu_songs_free_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/fosopadodagifoxabojujodad.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/karate_belt_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae3f751b-ab42-4caa-b20e-33fcd8e70eec/58250037821.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/biography_vs_autobiography_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/4223371163.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_off0000f15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15A 5804 bytes
SHA-256: f3e5dd3a9003be1ddfeb0ab48aef1307dbbf655c5bd5519ed0b907bfa6383916
font_01_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 13524 bytes
SHA-256: 5c99a70326d41c799e4113c434ca57f45e5c3752815e4e4ad99616e072080dbf

Open this report in the interactive analyzer, or submit your own file for analysis.