Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1b0387ed688b7e…

MALICIOUS

PDF

73.2 KB Created: 2021-09-01 21:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a935ac3b22f1a5528a621936b88a427e SHA-1: 4abdd51eb4b18aa0511fd6e45fd7e3b18c259795 SHA-256: 1a1b0387ed688b7e49cad2ccaa651274e050933e51de0021ddd108457add8f9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and link farm heuristics indicates a primary function of redirecting users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pixomot.ru/uplcv?utm_term=suicide+silence+and+then+she+bled+lyrics PDF link annotation
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/boh6lmirfjjhdl934bndh11kna/23313374423.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/qpb1uq3nm7a1e8kn69hvs3h7gn/80882330457.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608631b3130e5---98736534921.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/sq82l72he85ebgp0hohn0c4q16/kiweg.pdfIn PDF document text
    • http://web68s.com/upload/files/92294878353.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/r97ufp6o070ddste2nb0fbrvhb/jikumijaxetexol.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/rapunapigoruz.pdfIn PDF document text
    • http://lottfamilyreunion.com/clients/878857/File/fomusaviwezokefabefubapum.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/5fda6efe4a23a8b88d6665b6374d0c76/13833309923.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/51609031893.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b255f6dc01.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/441527185.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210527191747.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16072b9e437cc4---64926954304.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070168b44109---xezojidimuxi.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/lulodawirav.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/lejujokes.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adb61c429a9---nukisegegeziwowova.pdfIn PDF document text
    • http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/86218367273.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/7aa21db82376f218359e109356912e88/novefejugurutudof.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/biriberepitazomuvifodi.pdfIn PDF document text
    • https://vozilasavozacem.rs//files/98065916010.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de8a522ab86---nitegelabegep.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

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_off0000ba41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA41 16904 bytes
SHA-256: e7d995f1f59ce8fb35cbe436c39e1eb0bf78d7325b4167d9807b58460ab9502d
font_01_sfnt_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 10776 bytes
SHA-256: 6887554fbc8c8b7fb767bc0b33af73eb188c7de3a978801dc285987a797475d1
font_02_sfnt_off0000fe79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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