Malicious PDF — malware analysis report

Static analysis result for SHA-256 067d47c68376ee93…

MALICIOUS

PDF

85.1 KB Created: 2021-09-19 09:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5850ab24c1bb7ab1a82ab751c5f8dfb2 SHA-1: e00cd5d0fb751db14ec61c7ba652987bb1f6ccae SHA-256: 067d47c68376ee93a3382ce8866fc8db9bb5c16aa147187e421ea32f0b1ecb3a
164 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to potentially compromised WordPress uploads and other disposable hosting sites. The presence of a 'download button' lure further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://grnca.org/img/files/files/lokutupoguvilisen.pdf In PDF document text
    • https://cobrawire.com/userfiles/files/79803659554.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/zodoxiwafojakeku.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/sekinonunopoko.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/pagunalurulurozulafi.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/silusefunof.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/murokob.pdfIn PDF document text
    • http://intertribo.sk/files/66556263271.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/92389856043.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/29baca42dc66d3419a2e83c96b9d8789/zavajusemijaveri.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/gofuwemetete.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/51020635538.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210904190416.pdfIn PDF document text
    • https://fptica.ru/images/file/sasefijipedojazozelib.pdfIn PDF document text
    • http://afro-safari.com/upload/files/10874650296.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/logijasojevokatavepekifi.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/pevekitebazijejonaxezoja.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/20816040070.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/92892467524.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/bj71t9l5ke80vc30ifogqo1n1o/31150736083.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/zesufudefazif.pdfIn PDF document text
    • http://cheliabinsk.realxenon.ru/uploads/files/veketugobajujidimibemexu.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/dfdf68f79c13ff7f34922b902a47cdb1/kelatixedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=wrong+turn+6+movie+download+filmywapPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E0 11200 bytes
SHA-256: f6c854828f0699e73056589e7b9999aa5c102f0e44c30e10be70132594661063
font_01_sfnt_off000101fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FB 17256 bytes
SHA-256: 3330b9da4db3a7e4a47fc686596840b1164aeec8e5cabc4944e0d8088dbb3205
font_02_sfnt_off00012eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1