Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b5d4faa91afcaa…

MALICIOUS

PDF

64.9 KB Created: 2021-01-15 07:17:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8278a25d56f842676c9f1d64050f0786 SHA-1: 2451c3a67ceb1d58405c625be58dd7a9138837a5 SHA-256: 96b5d4faa91afcaa3bc51110bfcb4403a1c49abb68cc0912a5aa754f5e940192
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a mass external PDF link farm, with one of the first URLs being https://static.s123-cdn-static.com/uploads/4469145/normal_5ff6bd840304f.pdf. The embedded URL https://trafffe.ru/123?utm_term=soccer+head+championship+hacked suggests a phishing or malicious content lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=soccer+head+championship+hacked PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469145/normal_5ff6bd840304f.pdfIn PDF document text
    • https://site-1192107.mozfiles.com/files/1192107/somibuzujemazufen.pdfIn PDF document text
    • https://site-1168050.mozfiles.com/files/1168050/grand_theft_auto_iv_ps4_release.pdfIn PDF document text
    • https://lekomitigukajar.weebly.com/uploads/1/3/5/3/135345412/gizikinabiberajawizo.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/nakomujuwevi.pdfIn PDF document text
    • https://titoboxe.weebly.com/uploads/1/3/0/8/130874676/5018771469.pdfIn PDF document text
    • https://site-1167947.mozfiles.com/files/1167947/stokke_tripp_trapp_baby_set_harness_instructions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420597/normal_5fc4b96e798f2.pdfIn PDF document text
    • https://site-1177174.mozfiles.com/files/1177174/70971726789.pdfIn PDF document text
    • https://site-1174757.mozfiles.com/files/1174757/52728044413.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/setigafat/debriefing_sheet_example.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/nugemijatimemewinefir.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/zemaxavase.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/29957823220.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/bupegigurilurobirap.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_off0000c0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F4 5448 bytes
SHA-256: 5eadf090f7bd7cfa15be5c0c44727c3573131421c4dbdb2ef304e3713d91db77
font_01_sfnt_off0000d34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34F 10356 bytes
SHA-256: dbc61bc70e83c8b1001faf30a99b33d4b3da4cd8a30f16830fbabcb742f81f3c

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