Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa7122378cfc102…

MALICIOUS

PDF

84.0 KB Created: 2020-11-17 19:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d55e3b14d7ddbc09612a06dbc6bfbdcc SHA-1: 7d3fcdc7d34f6d66e4fbe201a945fc7463d1d50d SHA-256: 8fa7122378cfc1025feb4fefde6666a6da7bc26d5133253bc023bf56b277aafb
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics, including a malicious redirector link and a link farm, indicating a phishing or spamming campaign. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=0.75p+1.5+kv+j
    • https://fadexawotizetav.weebly.com/uploads/1/3/4/3/134339615/9210093.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/levovod/tesla_model_s_plaid_cost.pdf
    • https://uploads.strikinglycdn.com/files/98f30e10-ef9e-4fab-b68e-fde9c175b0d5/easy_electronics_kit.pdf
    • https://s3.amazonaws.com/ragejufa/napasetobenax.pdf
    • https://uploads.strikinglycdn.com/files/51afc640-2afa-448a-b49b-9c707b4ec11a/68647645990.pdf
    • https://s3.amazonaws.com/pevuwarobuvowa/animaker_voice_review.pdf
    • https://s3.amazonaws.com/garorowa/nulupemizap.pdf
    • https://uploads.strikinglycdn.com/files/0984c34f-b553-494d-86da-1dd084275e79/97839260262.pdf
    • https://uploads.strikinglycdn.com/files/e128b8ca-a795-45b3-9f3f-86d682a5d0b6/29308850542.pdf
    • https://uploads.strikinglycdn.com/files/49ab590d-b15e-4144-8f4e-a3c16cd4480e/google_pixel_instruction_manual.pdf
    • https://uploads.strikinglycdn.com/files/3551a54e-8139-4051-863d-dbe8b522eb3b/ledemeronegop.pdf
    • https://s3.amazonaws.com/nimuwet/89810811175.pdf
    • https://uploads.strikinglycdn.com/files/5b0fc129-2940-41ae-804e-10499e789431/williams_gynaecology_2nd_edition_free_download.pdf
    • https://uploads.strikinglycdn.com/files/004835d3-1b95-4ad2-bc9e-44b411925a2f/tojogibo.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_off00010be3.bin
91361df9570e9cad6a81cd5e7e90c19ea9986fe3f5b1c2af8aaea1015d8b969f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE3 4832 bytes
font_01_sfnt_off00011c94.bin
4432c1c19140b76e375dbed6a958469705912ba2d3866c7efe16a178a1433f70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C94 11400 bytes

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