Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e441888c0a69fee…

MALICIOUS

PDF

74.5 KB Created: 2021-06-27 08:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 69b6fa375667d5148d9e00c937111495 SHA-1: e380ab59947bd19ae6c50012f4949b9ef33958b5 SHA-256: 8e441888c0a69feed26366f7b36ea0f851eb7259616f246a70efd6f9188cb2b0
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many pointing to compromised WordPress sites and disposable hosting, indicating a likely phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external URIs and link farms points towards the document serving as a lure to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://wastran.ru/uplcv?utm_term=winters+mill+high PDF link annotation
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca32f48526---gelapolilisumedo.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/pegegeroneki.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/e40117614896f376d2ebc587c87e44ee/20853142438.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/00262ae3e0e4c63a774357799c85e021/38197274300.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/53201989800.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/18005307994.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/gizasutujuniwumase.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609107a671c92---rabojipevulilibidafesut.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/xudigiduvibiro.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/b2a76a40900f34da834e56a92e9b86c6/74762487069.pdfIn PDF document text
    • http://bakoca.hu/files/file/manitojerizudul.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/63c5f6b715615a4de8ce798e0ec5dd97/sujiwoli.pdfIn PDF document text
    • http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/zoduroza.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acdc4d0a54b---getaguzikarenenopasaxewe.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5255e139c9---17529161004.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/87031944581.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/54837636485.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/ba24d38df80df1ee1fd49b15a4848b2f/10762193157.pdfIn PDF document text
    • http://houselandia.ru/files/tawamipomawubumebi.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/7189d06de40a4af2cd7320b530dd7c00/dafojawemozo.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/880rbsftf0sia4d8bj6djm7eqf/68244842808.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ma1hsl6vegd351ov2ncp58g550/vakufagabatitewela.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/titobawalolaxolete.pdfIn PDF document text
    • https://capecoralliving.com/media/file/32781398516.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_off0000c352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC352 16564 bytes
SHA-256: 3711152490cce68c6716195cf57c7554f171bc427ebde3aa3a602f2bd49af709
font_01_sfnt_off0000ee2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10644 10264 bytes
SHA-256: 3ef43635ec20d927c6b3ba506252a06fb32b0c972f89e05f187da07fe90b4c70

Open this report in the interactive analyzer, or submit your own file for analysis.