Malicious PDF — malware analysis report

Static analysis result for SHA-256 f403dacca2a636d9…

MALICIOUS

PDF

72.6 KB Created: 2020-11-22 01:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 078dfb50eb47834872ebbf801440d890 SHA-1: 5ddb84404f552145ef482d12c2ad091678bcd59d SHA-256: f403dacca2a636d9c20e9046564907c171172e7773165bf1a6241f401c951965
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated and unreadable, but the presence of numerous external links suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/aws?utm_term=civ+6+guide+pdf
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5fa0eda80b131.pdf
    • https://jowovodepavilim.weebly.com/uploads/1/3/4/6/134651336/nikarit_jijolexasojuxe_fizeli.pdf
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/wobixojitimuv-tasel-texofefamolaji-rebomapo.pdf
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5fa4631f8a32b.pdf
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/jadoxodox.pdf
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/toretero-virixarer.pdf
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/jufafowovu_lufufovagut_defomaren.pdf
    • https://xosetumigex.weebly.com/uploads/1/3/4/3/134371377/9951601b56d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d4055226-4839-43fe-9c01-3d3d1b0330d0/95761913.pdf
    • https://uploads.strikinglycdn.com/files/9cbcf195-df2f-4c67-89be-b6a16a5e9d8b/basic_electronics_book_free_download.pdf
    • https://s3.amazonaws.com/sugaguxagu/4058053281.pdf
    • https://uploads.strikinglycdn.com/files/d4005f36-8413-4126-baaf-74f8db23e64b/il_barbiere_di_siviglia_largo_al_factotum.pdf
    • https://uploads.strikinglycdn.com/files/565f9b3c-b4cf-4a5f-b559-71f57f8d9013/82978258227.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_off0000e0eb.bin
e06233e5f6d9657d5b9e7297c905644512d612d77d38479fbf023f4e8b21943a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EB 4812 bytes
font_01_sfnt_off0000f171.bin
63cd767bb66c22b92fa47e8b79d2180e6ab5be778e6b59195cc1279857cd5019		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF171 10748 bytes

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