Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf03e68ac0598f1…

MALICIOUS

PDF

84.2 KB Created: 2021-09-17 09:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3163c2e250e5d9b7ec47eedbf5c197b0 SHA-1: 116d77f1f367ec579508c9150f93c7f44df372a3 SHA-256: faf03e68ac0598f1f4a47c4ecb6059fbf0267fb8b8b61363d379d082bfd55e86
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs pointing to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest the document is part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laborke.ru/uplcv?utm_term=android+real+time+location+tracking PDF link annotation
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/90224841398.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/xewovovazasipejamobazedep.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16137743e42c11---xapopitigimofajer.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/lakaxor.pdfIn PDF document text
    • http://erpos.sk/data/files/96945801332.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134ee4070b30---fifozo.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/vaxijoviporopesexajoxinoj.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/50150994313.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/peziwuvi.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/xekazesedogojoruvikanoxo.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/pevonulefogod.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e69c553a58---lusiruzumizatibujijik.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/55083808796.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402d1c2f3c8---dimaladijiku.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59637627704.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304f78636a8---vifilitap.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/larejafatuvixera.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/6421115275.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354a5231a0c---duburumezabarubokag.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161326b83653fe---petiropupijidigawi.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/77129c5d891ea334ecb8a8d35e626fac/melajalanetaboromaguwi.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/9770009780.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/35303518553.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613163634e5b1---sututizozanora.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/wikafupunopidudiwi.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_off0000e507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE507 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD19 17876 bytes
SHA-256: ec24ffac7368b875733ac6704c7e63fae7ffec8b6ec31f40b0a4d62a35a24996
font_02_sfnt_off00012af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF3 10620 bytes
SHA-256: fc376b9eefdf962679ddc1582acaf487d859580f9f9a7fae29f1e0eae79f517e

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