Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0d44a82cd12fce…

MALICIOUS

PDF

70.4 KB Created: 2021-09-26 06:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d4bf4c17d0460907cd263c247e1eee04 SHA-1: a2b400bfce674462867db1f6a6eef46416cbc8ee SHA-256: ab0d44a82cd12fce768bd398c17071729bdf0011be06ab4223ae04639e39ee99
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://coretry.ru/uplcv?utm_term=pm+bakshi+bare+act+pdf PDF link annotation
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/c4f8cf0cd5bfe384c573efa1fa97e702/sixewipumoduzabatukoveze.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/73d0057e81e9a20370aa621c28ba3082/dubanuda.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1631521295.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16147964d7d310---vomexofuweramobuz.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/24842633979.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/jilupi.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1614d005d1044c---59859639875.pdfIn PDF document text
    • http://fitviewer.de/files/file/mimosuzovilot.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/vebawiwalikapekewaxeni.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/2308873aaa0acbc1bf85e8c902965654/19766946534.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7bdd368f7---88631962239.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/rojane.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/73106546615.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/d948108f3947477ee544210f8b86ab3d/21928334686.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/43130494711.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/gabusemoka.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/80876527934.pdfIn PDF document text
    • http://erdbau-rauch.at/nigowedutab.pdfIn PDF document text
    • https://kaparatt.com/images/File/89029254513.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/19440690331.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614df3662f2c3---selofegeragojok.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/fazafuvogebim.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/dokadozizixo.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://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_off0000b1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BD 10848 bytes
SHA-256: 6a4ff21c794e1b1dac57c6177601ccae9b1b1d2bc4d92b063eefae906ed5e886
font_02_sfnt_off0000e293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE293 16536 bytes
SHA-256: 90b26422af36cbf276677bca2cbf19d72f5824ff5267e1a14c136422dc1fc204

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