Malicious PDF — malware analysis report

Static analysis result for SHA-256 b270af7737b07e2b…

MALICIOUS

PDF

103.8 KB Created: 2021-07-01 19:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ab9e3f0a9f80028b5ba4da25047bf4bf SHA-1: 3b6cd32307b047a7f1e67bf95364f8ed9b4ec362 SHA-256: b270af7737b07e2bde736e5b20a58c68808b2ff07c8066a67460f0b95b308cac
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic indicate a social engineering tactic to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://philabc.ru/uplcv?utm_term=seeing+an+eagle PDF link annotation
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900d3d1b95b---37254267175.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c948d4457---vetipuvemi.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/bt3qio61j7fs6nlo4al6slskm4/53014463148.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/bupigi.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/bimezedusoxujerofunisano.pdfIn PDF document text
    • http://canvangdientu.com/images/file/riwuxanubesedefik.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/f41cc523561b71b9e8c3bbf978365a46/27049913377.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/77ab56f8f839c96da746634589a899d7/gaxiwojinijazopiwajak.pdfIn PDF document text
    • http://rayanchem.com/d/files/fuzutivogofidanofozupati.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210430084601127.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/82635699328.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ac19af25c11---29176218977.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acce72703be---ketewu.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a07a7805261---makivaladomerojujupanafi.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/6b7deaca208ae6b88adf8a7750a9611e/wexokukajiros.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b0db4e30b---sapokizuxojojepituxe.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/f546261218b9438c3fa534befbf67b22/jujiz.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/91b3e676dd8a2d2a04da38a24f4ed241/14311615794.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/51c0e0315ebacc3133366ffdb1661d92/fujufibogigudova.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4f237d77b---moxonotafilavimaluzar.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/nobuzise.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8105fe079eccd4d91c8047aab267c5bf/63311374015.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/16639995505.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/b5e5e293dc788a684513f60a17a93c1d/wimipejew.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/8ebd2df5338f74c4c297b1a3bc6c86a2/gabalojalufowojululava.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c7276fc3843---75554806289.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_off000135b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCB 17724 bytes
SHA-256: ef70e00277685a4cf97fb7a139de195cd38e8a678b212875aa3af33120a3a762
font_02_sfnt_off00017c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C47 9872 bytes
SHA-256: 7528b929754a4a85a0b42eeeb8e59727c17140fcd66b5cba6509e8fee6ebe054

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