Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a203e08a2ffe0d…

MALICIOUS

PDF

77.1 KB Created: 2021-06-29 14:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f34a6207c7366bddc392a291be3dccc0 SHA-1: 716bd316737bb5f517bf20f4eec51c0416007724 SHA-256: 72a203e08a2ffe0d104a6ecc32f2c15ad28f64ca3da2b3fb63873140228ed37a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://pistant.ru/uplcv?utm_term=tamil+songs+collection+apk PDF link annotation
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/81847958186.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/21064906974.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/9245f3b419b103995360cf047f7eba4d/katarefapetuvibawezitedid.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/jozasufevobapejedekup.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bffb30c7ea---83125047520.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9264514317---xofewanuwel.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/94152360173.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/xuforujarirolazon.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/h18343ca247vi0n973t17he1nq/jiturikeruxuv.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607867ae18739---lexekebu.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad962220818---raduzonopate.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/70665950379.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/kizewamatepezadivalunud.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5f9eeb6214e11670326b57ee10e816c2/49200002469.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/15a2c0bbdf699b16854d3c337e43d03f/67208608249.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///81970083219.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa6f5fa5c49---18385276178.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/raguwisezevoxopa.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/20901ca702cc5762eb7be942977fdcf8/6239829212.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be4d9b6e959---paxawanitu.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/s763ofk09i2g33fdkv9upepe97/xulivurolezut.pdfIn PDF document text
    • https://efnnma.org/files/file/53520363081.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/kadivedoxesis.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0846deceb---situpalexutemi.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/68402223967.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_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 17048 bytes
SHA-256: 617dd87864bba2f8dd7bffb7e240604a99430c19e3b29f1786d93cf7140eb283
font_02_sfnt_off00010ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE2 10672 bytes
SHA-256: 36151f86a2b7cabe252fed638d756974088b526c7a1104c960ca55aa676d05b6

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