Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d029413ccbfb49…

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 13:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 654c4dd9380451b3cc50acbdc2ecc5ad SHA-1: fc272b46768c8c3a0a0b556b8fc40d16d3dbfe7b SHA-256: 60d029413ccbfb49c701588b3f2ea8c010373958532f913ec898bbfc798067b3
104 Risk Score

Malware Insights

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

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are identified as a link farm hosted on disposable or compromised domains. The ML classifier strongly indicates maliciousness, and the structure suggests an attempt to lure users to external sites, likely for phishing or further malware delivery. No specific family could be identified.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://adaviestransportltd.com/userfiles/file/fololinetogosobidosaf.pdf In PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/niguvutexikari.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jewomekukub.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/nenatiwededidifiduxinoful.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/20dmv9vuqt4tn021fu9r0rq0br/zesopovuwu.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/47edeb82cf8d6b08f927188e0102be5e/85393657427.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/jaliboririvavodosufa.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/56272443278.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/devum.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/jojuporoxatos.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/1f2673c8a5e7cabf3476ae5876815b0b/wozizisaxasesabe.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/xowelimavoxiwinaraxib.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9de18addb---domopumafimimulew.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/28734928208.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887aedf148d---18869564939.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/49285930382.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/57496ebb58981a0c4f6ba6cd3c28e698/27569489309.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4d6983ffb---rikesonunateg.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/nalotukiriwonorozewa.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/27814483556.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46b17e2d49---rakaroga.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160733a93273e1---ginesudavunovabev.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/22529310515.pdfIn PDF document text
    • http://dzbnf.com/upload/file///bojirinetuladubujimolili.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160734db4112a8---nitikifonisupo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ethno+nationalist+meaningPDF 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://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_off0000e24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24D 18192 bytes
SHA-256: 29db6c046b3adca05ca008eaaf47d0197c7a8a58a69343f4f0c3fb8cce69774a
font_01_sfnt_off000110dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DD 10440 bytes
SHA-256: 81be01ad34dc880ac9985476ac6d1a60c8712a0dbfe13056e9a8642155edf95a
font_02_sfnt_off00012853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12853 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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