Malicious PDF — malware analysis report

Static analysis result for SHA-256 701f571b4007b195…

MALICIOUS

PDF

69.1 KB Created: 2020-12-27 12:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 698ed7b67ff04cbd07d6b9364df8b104 SHA-1: 99798aeb249d333d130f06a90a7369ea0c40fe76 SHA-256: 701f571b4007b19552ece23a5532a0a991dcc2f3f0bca84dea40b3b0524892e4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a pattern of linking to potentially harmful or deceptive content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

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
  • 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.
  • 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=fly+swatter+game+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_5f9b72d965a92.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/ferulefigujebovepa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5fcd0a8eb81c4.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/igigOib/mens_short_haircuts_longer_on_top.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f91d803d6b45.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/8fij4pU/walemowave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467910/normal_5fbc79e540443.pdfIn PDF document text
    • https://zawiwiguxasawum.weebly.com/uploads/1/3/0/7/130739629/pitasilunodose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7924fe42-213b-4a0d-a548-ff36749fb410/top_100_golf_courses_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed648ad-9548-4953-9ab4-48533ba09d98/37934274402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f232ddd2-ca8b-44d8-a3b1-79379aff0c0a/kaxujafagakafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f267386e-8a56-4444-84bf-d6e6092b6aca/tatajenitixabulavoxonoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/104c786c-fe5b-4e7e-a129-e50102844f65/wacom_bamboo_ink_pen_manual.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_off0000d29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29D 5156 bytes
SHA-256: b52e37a385a7949757c6db8816ce576f0b4b91bc9ffce18e6283defc8c7d1205
font_01_sfnt_off0000e42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42D 10444 bytes
SHA-256: 0ff9510302883944ba601e5a5c0393f68495c6b895c5ba65689bda5d4bbff4f6

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