Malicious PDF — malware analysis report

Static analysis result for SHA-256 054f2683503029bd…

MALICIOUS

PDF

99.7 KB Created: 2021-06-27 00:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e6e2f0ac91d0cd615f7f1fc14ea80bc1 SHA-1: 5b5fd88848fdfa6d938e10a2650429409d2a5042 SHA-256: 054f2683503029bde2b8579a9ba5e3c13aedbb81de3c4bd8c2f81ca68d7ba4ff
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm pointing to compromised CMS upload storage. Multiple URLs were extracted, many hosted on potentially disposable domains or compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links indicate a likely phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://sns-russia.ru/userfiles/file/pimitisemurijaxuselirawo.pdf In PDF document text
    • https://pindimana.in/uploads/file/gixikamixunofuda.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607990943f26e---45032705382.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/j0rgkovmkcpddirn01igci8gcg/pexeropigigebized.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/24d53614cac8eae956ab49280968268d/60532394449.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8f150d3ee---74798767369.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/bc94a5e97ae4e2b03aa220347f36c9e0/8903332861.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/4sg2jkejaegl1mi3h7ktb9qnff/kotifazakulemoxa.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/71219340804.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/0f6c04e0d265273968815a557748795f/61739886722.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/9066066875.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/23718327221.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/26635727650.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/sli7t91le3jnopeqfl2spi2n4m/67660212116.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f68806aac---61971039109.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/mevoxidum.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/9c8322c1006f803b6a2769d277cbff23/27960154112.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/51993094284.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/c3f59fa048160e6448dda83e27fc38a5/batodoguxidixadanabepeva.pdfIn PDF document text
    • http://thedreams.cz/files/loweralogujuj.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/fbat5qb1vfuoqbquk961tp65m8/galudoxuxapib.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/9f15778051f7b83fb21e85fe6c9d070a/dalafozobefixo.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c81b87c32---zamixomulujubujapifexel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=johnny+carson+bloopersPDF 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_off000122bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BF 10524 bytes
SHA-256: 3d296127cf350bec5602eeb8cb22b7d9f79083ba47b4590411e30a737812808d
font_01_sfnt_off00013a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15289 18360 bytes
SHA-256: 125c3505deaf1db98a342d808800eaebf86372abe0c1fc0602dc9cdb98e06748

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