Malicious PDF — malware analysis report

Static analysis result for SHA-256 e591dcd473c7fa36…

MALICIOUS

PDF

64.9 KB Created: 2020-12-11 15:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5ad11363629a2f6973dd7ab5228615a2 SHA-1: ddf3218af0b7f6f3f0a397f2292550fd8fe6b64d SHA-256: e591dcd473c7fa363ea51ab16041aa4526b25946ca6742977bbad738cd49df83
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://trafftec.ru/strik?utm_term=failed+to+open+pdf+indesign PDF link annotation
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/xubibif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382196/normal_5fcfe9f39a711.pdfIn PDF document text
    • https://tamoxukezoge.weebly.com/uploads/1/3/4/5/134585929/1041271.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/nerajenopema_gufat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470226/normal_5fc6b59314d60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_5fa8c34a3ca5e.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/348c3d5a-5feb-4ea6-8cc6-aa9ede90ab36/vivumugakininapefebot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cfee4f7-ed7b-4f78-8806-d007e00fffa7/93884850602.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc306df2e537a05ef16faf6/t/5fc3c84c61e25426e1ab5e30/1606666318178/zinavuribugusipajos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52143481-e935-4cb0-b223-2d487a987a2b/gods_debris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3684d35a-5773-4f9d-abc1-b9817194a1cf/52351592149.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_off0000c01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC01E 5068 bytes
SHA-256: cfee68ef8ae3a36dfc9bfda8b25cc61c6c5784b497c11db145f814be8e87a16c
font_01_sfnt_off0000d177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD177 11152 bytes
SHA-256: 22bb7223897be896e5049765cb34c3ef23ef64d75c323211e3d0316038815c4d

Open this report in the interactive analyzer, or submit your own file for analysis.