Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce64065ab055f941…

MALICIOUS

PDF

58.0 KB Created: 2020-11-18 03:18:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb854519a13892821d6f1dc89855d7e2 SHA-1: 59232883a9dd291f7c4972d1f8532ce4c858d9e0 SHA-256: ce64065ab055f941d86c3cf9797c4435e2fcee1d3e00f5d54ab9cbae43a347d4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical PDF link farm detection and a machine learning classifier, indicating malicious intent. The presence of numerous external URIs, particularly the link farm pointing to 26 other PDFs, suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and URI findings strongly imply it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=2048+fnaf+2
    • https://duxujofibedusor.weebly.com/uploads/1/3/4/5/134577283/5258887.pdf
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bewoti.pdf
    • https://giwafadewixagi.weebly.com/uploads/1/3/4/3/134369241/2526156.pdf
    • https://jadibezunapav.weebly.com/uploads/1/3/4/6/134610372/bakubadosi-metubukotugede-pamagubukogebib.pdf
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/guteporakew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/taruzudov/fuwizemitajadefe.pdf
    • https://uploads.strikinglycdn.com/files/25f30dea-53ae-407a-87ab-cef030e2aae0/yugioh_power_of_chaos_all_cards_list.pdf
    • https://s3.amazonaws.com/megodipewukitoj/turixabixekefokemagujaw.pdf
    • https://uploads.strikinglycdn.com/files/faee2afa-ec79-4f07-be1e-2056a8d0e2f8/gudilibul.pdf
    • https://s3.amazonaws.com/vexeliku/conventions_of_greek_tragedy.pdf
    • https://s3.amazonaws.com/kavitokolezub/sanazeremevowifimovov.pdf
    • https://uploads.strikinglycdn.com/files/43fd5003-9975-4d71-87b0-b1f2415c229d/xalogemibisame.pdf
    • https://s3.amazonaws.com/midaguvimabof/26178739946.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a935.bin
a5a46c03c77335d67b912a483aa2ae462ccf459a3d066adba2b2730e261ff170
pdf-font-stream PDF embedded font (sfnt) at offset 0xA935 4916 bytes
font_01_sfnt_off0000ba0a.bin
db2b3b1b83b6f71dcb7ea517bde98d05dd74164f8c5cce2f28827b7b3d538635
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA0A 9896 bytes