Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2075aad988a938…

MALICIOUS

PDF

165.6 KB Created: 2021-07-03 03:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 88d71652f57de2520cdda2300e54f33b SHA-1: 6a8bd5107aeb5694ad8d5c132600282e06d43818 SHA-256: ba2075aad988a938774f18990327ec4a99fbb29cd622c1aec40c119c84ae2527
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to exploit users through deceptive links, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://huntic.ru/uplcv?utm_term=street+fighter+for+mac PDF link annotation
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/j3vo8895q0ad4ugunml1s4gnqs/zalujexilenuku.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/57526287167.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/17863504370.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/cpov3p474qfjvv2hihbk5icitq/mexajuvaxerazaj.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a04d0a33e---dezupasiwinizojelotix.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/86882736488.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/69191058919.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/5e5f569eb6e12321e7628adfb381d392/misusiboviworigel.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/68629407199.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/99115042736.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/65915190553.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/d3e9b38bd6e592167878500f23d56871/zisevakigedofewu.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/19866765242.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4911627a1---gozavabe.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085c206bae22---wawidelibide.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071194ceeef0---38371155861.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/43097201472.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb41979cfed---54281936335.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e4a4bf27a---90582737207.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5da39aecf---48261216882.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7573ffa20a7c2878f3fa05e9693c7695/wavozemibumutukikuxikef.pdfIn PDF document text
    • http://jinohair.com/upload/files/93085329696.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/ct70v3su84i9ehta1htvt7lino/wiwow.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/gavokikozawexubojuzukive.pdfIn PDF document text
    • http://sergey-yushkov.com/pict/file/feroxefo.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_off00022ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22BA5 17300 bytes
SHA-256: 04b04ad0e1e86015992f724b0ad88a382b180b1094a710a75c9eb4b8d887c766
font_01_sfnt_off000258ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x258CA 10540 bytes
SHA-256: 7ed04fb01c57288e63e8aa8e681e372c47e6db2bdc5994822eeda16e8a5d6bfd
font_02_sfnt_off000270df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x270DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1