Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ba388173310189…

MALICIOUS

PDF

71.8 KB Created: 2021-09-02 10:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 67ab9c5779acd8a6895e9775a7e9448e SHA-1: dba586e38b7c7fa15bb3ab0abf07d4216e72e202 SHA-256: 03ba388173310189d08826c6fc06a5a43e731c550883402f37a71e9f41ef6f7c
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable or potentially compromised domains. Heuristics indicate this is a link farm, likely designed to lead users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary goal appearing to be directing users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://jafra-com.at/userfiles/file/dofonexabozuxuxibom.pdf In PDF document text
    • http://busankid.com/webfiles/board/file///rujumamelajutoreradikep.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf2b5cb80b---52111604796.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c57396181bd123b9df051fc8f4ff71e6/64667144608.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/danag.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/nowuzap.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/33486234353.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/12964037161.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/54922975134.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/viwajusipemudabajuxikado.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/1cha2qhi0hn6104cehefsnjsbl/52569432768.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/fd74d11b32505f9430fc2561bdd72632/vovomemufosugafekomoga.pdfIn PDF document text
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/8745a63b4b602fade9d25e269462dee4/pelamo.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/161256ac46950f---fikagutefijunisenaratogub.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47a1a3e890---54244870943.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/wolusoviduz.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/93758326565.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/lirosutewovaginuv.pdfIn PDF document text
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/romixavafaxatigel.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/credt3f9skrbng35cck93jihl1/53607645915.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/nuneviba.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/e037dc4eae6327e467cdc943443de279/dojefesuwasub.pdfIn PDF document text
    • http://rs-entp.com/upload/file/dawiniti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=letter+of+recommendation+administrative+assistantPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D8 15548 bytes
SHA-256: 1784f2414d58ee8658c569ca32a8a655b4250e10b56c019ff20cd8114a1f42da
font_01_sfnt_off0000e119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE119 10616 bytes
SHA-256: 0093a427f6540a206a1e23c3e4473adbf25f10e0df7b26923ff119c41a1ba946
font_02_sfnt_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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