Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a46f858d7a30f1…

MALICIOUS

PDF

73.1 KB Created: 2021-06-18 03:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d69cfa933d6c121bae0e5f3ae32dc429 SHA-1: 2409a90379e225b94aff3c86cdda93be99657821 SHA-256: a5a46f858d7a30f133f34eb5c1d7034c0b6709113ea43eec37b6d6a3edede0db
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure disguised as a shopping list, likely to trick users into clicking the embedded links.

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
  • 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://kapli74.ru/upload_picture/27144254084.pdf In PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16082f4e1c164f---78211787779.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/buzekorol.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16071c159bdc37---ranewokafajugagudiwapig.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/42930398331.pdfIn PDF document text
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/69160740715.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b5db204603d---58487172578.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/77737616388.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/4687031180.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070931d54d3e---70764125684.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/85432992129.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/13682134842.pdfIn PDF document text
    • http://sciattella.net/images/file/bifagudisevawafisa.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7cfdc0721---95881565407.pdfIn PDF document text
    • https://marmarases.com/upload/ckfinder/files/xamujilizenudanu.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c40ff67529---75392771446.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/2jsno52gtbqtfiptujtju0vrd3/80511854226.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/70647183704.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/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=vegetarian+on+a+budget+shopping+listPDF 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_off0000dee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE0 5324 bytes
SHA-256: 5fbe2af16f79cf7bed211da9fb185f7ae964f81d426930ffc9e14f5e434c5893
font_01_sfnt_off0000f0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 10728 bytes
SHA-256: bcca601cfae1bb4fe6e08b7d2af1e62a33ef44445ac1cee86745167bc1f124b3