Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b79b0591668b346…

MALICIOUS

PDF

70.6 KB Created: 2020-11-18 15:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 185197a28c6c7db7809479182377a2a3 SHA-1: 1443060b3645c51bd46bc85c0485ffa4a8ee7a87 SHA-256: 1b79b0591668b346e2e3f4adba7f2d5d9de9aa58ad7a14ddb5b27950326e7303
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDFs hosted on Strikingly and other platforms, suggesting a link farm or SEO poisoning attempt. One of the external URIs, 'https://trafftec.ru/aws?utm_term=tipping+the+tour+guide', is flagged as suspicious. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

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
  • 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.
  • 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/aws?utm_term=tipping+the+tour+guide PDF link annotation
    • https://xopugexufejan.weebly.com/uploads/1/3/4/7/134709921/nasogogubuvuleg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459319/normal_5fa5b7e4cd029.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/e05b3a12-9c5b-4600-a01a-90b64df528fb/powerflex_755_manual_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab2b9a08-2a5b-4ff2-94b1-aa764438d0af/9898557069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1ac1469-4c4c-480b-9344-26bfb7e6d23c/bujumuledajowake.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/lonadevumudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74fa783d-2912-4de7-b9f3-7bb5ec06caea/terrace_house_tokyo_2019_2020_downlo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d14a455-c0cd-4582-aee0-c8f3a6525ce1/mafeligimuvil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dacf38fd-f2f6-43d0-831d-ee92c7053b83/28423589455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2cf05d-f79a-43e2-a1c5-fa1ba9ea8cf7/kovenibadititukasos.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/julejesolagigodike.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A5 4748 bytes
SHA-256: 3f3b7f1415e0986797e356b703b92c82006be9a1e835319596abd788873bc1eb
font_01_sfnt_off0000d0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C6 11176 bytes
SHA-256: addbb6a49073088d1477cb3fc8d41ceab740e7dff1874629f6e052ad5bed768d
font_02_sfnt_off0000f6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6ED 16540 bytes
SHA-256: 5b4794c93703a920072742ceea444b957e43c0a2076e82313671a1fa5849576c

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