Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2a4efdc6ad7fa1…

MALICIOUS

PDF

73.3 KB Created: 2021-06-21 01:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2b5c05defcc9e18d70099dd34245fa13 SHA-1: e83f3b300f561b5e1f3a1d59878dfab3792caae7 SHA-256: 0d2a4efdc6ad7fa1eb556093f8d58d9e4ebd9c5b458f3058a73f69dc97127404
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm pointing to compromised WordPress uploads, likely for hosting malicious content. The embedded URL and the document body text suggest a lure related to software serials, which is a common phishing tactic. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868626404a6---52453907769.pdf In PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/291cd5h3u96l4n9lo9g8iihu73/51179632467.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/86702899865.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/403c11e2b3090fc03b089808d4a457e2/tatoxuwipolokarakoridevi.pdfIn PDF document text
    • https://areicon.com/images/file/xomitulusar.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/45868820115.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/943b4184ebf17476775b9e4dfc61485d/67786109238.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/85ac34e480d155ece78a84f9d89a2b9d/fadaturuvafipamivo.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/jaburirubupinumipef.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/e48267qom6qc95jd5k0i7i3vru/dezesiguxexefa.pdfIn PDF document text
    • http://teraval.cz/res/file/mufodutisod.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/50310239549.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/81854011794.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=cinema+4d+r14+serialPDF link annotation
    • 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_off0000df31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF31 5016 bytes
SHA-256: 1e20993313b584f8c6d1d63b173a3174cbae813ccd4735f1aa350111c5a30ddb
font_01_sfnt_off0000f026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF026 11392 bytes
SHA-256: 50d37e1b302e3d6f48f1a551fb6f51ca1ee09c499e18140f8834faf3a59f284a

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