Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a04f494bb1b2628…

MALICIOUS

PDF

76.0 KB Created: 2021-02-22 18:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 16fb4d4019addcf5baf7a3d5aba7adb2 SHA-1: 606c6f0d98c12a9d82e8a9fd5a6a7c7fb133ad20 SHA-256: 3a04f494bb1b262822b128cdb6f0d857407b7e4de2c0578a3e4b8573607efabb
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

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://jottigo.ru/strik?utm_term=examples+of+fractionation+seduction+lines+pdf PDF link annotation
    • https://madoguwulivusi.weebly.com/uploads/1/3/0/7/130775056/roximopagi.pdfIn PDF document text
    • http://vorgazme.com/baldurs_gate_2_side_questsed4mq.pdfIn PDF document text
    • http://dwatches.site/kexopudokakotadawipk4kva.pdfIn PDF document text
    • http://begemotiks.fun/crossfire_ii_4-_12x44_v-_plexxup2q.pdfIn PDF document text
    • http://servempieza.site/olive_oil_formula_deep_conditionerxhlxh.pdfIn PDF document text
    • http://newser.site/neserevavivuruaq9o8.pdfIn PDF document text
    • http://xeeewq.xyz/arena_of_valor_switch_crossplayld8q1.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/mizeteb/assassin_s_creed_unity_trainer.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/amcas_application_guidelines.pdfIn PDF document text
    • http://watawazorino.rf.gd/hey_siri_call_my_girlfriend_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/maxagi.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/sisudufowafinexomunabu.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/que_significan_las_bolitas_del_rosario.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_off0000df46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF46 5208 bytes
SHA-256: d59cc40f984876847f6b450600d348a580dc9fe944d97efb7112f43675b58d8f
font_01_sfnt_off0000f0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E5 10680 bytes
SHA-256: 5d66dd8782345abe1924cc5f0a892d912c41c1c712bc9cce7e8d2fc70f630fdd
font_02_sfnt_off00011536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11536 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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