Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b74427bcc23be1…

MALICIOUS

PDF

84.7 KB Created: 2021-09-02 12:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 25ace1ce71b0a3948c852a04ba1cbee4 SHA-1: a2c3e319dcca9f736b8e7fee1e2633bdf3febc65 SHA-256: 29b74427bcc23be13a3eaf4084a8c16a55e60e8efe92e83330a87ca6d3e93bb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to lure victims to malicious content. The presence of multiple distinct hosts and the use of UTM parameters indicate a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://smidgel.ru/uplcv?utm_term=rca+tablet+w101sa23+manual PDF link annotation
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c258ac9d73f---12487637993.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/3ba0e97baaf6d3650cb38ef7695e6d70/bowanedujozunuzurifafa.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d093926e95a---42276738954.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/66341117802.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bacbd01fa---63122404556.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/jofeluvaji.pdfIn PDF document text
    • http://belst.by/upload/file/74585156715.pdfIn PDF document text
    • http://sushi-belovo.ru/files/60609161051.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612507cc757e8---19995475504.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/811c3e690a590e4dbb14fb60e8f6315b/jupul.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/58892071906.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acc0734b947---fakorevime.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/nitumeduvunudarunewen.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/nivuxoketisudofowukataja.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608138d02b796---zuginipenewuzu.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/2a8e11b13135ff7f5132e12c7d65279f/89467585430.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/36901803551.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/55674792372.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/r2oudsddngkt6rk86h9v4dl6jk/1889393361.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f478598c0---4625625204.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf00d1873---32870114470.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/julojetokeneb.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/eda8c05260d5ee7fcdaa2aa1bdc3089a/noxilunanitumedamad.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/331867694.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_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 19368 bytes
SHA-256: 58bcb765a4e5de7c9e182d269c55b37be9a2ac4f1c73af54ad8bf08124550f9d
font_02_sfnt_off00012b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B76 10916 bytes
SHA-256: 438182170a73e3a16eff8393e08b874aa8d29114465b4cb65643cab1379438fd

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