Malicious PDF — malware analysis report

Static analysis result for SHA-256 41169f42cdc20332…

MALICIOUS

PDF

82.6 KB Created: 2021-09-07 18:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 14ab547cf11c14b9cb46358db9543881 SHA-1: cf8b69304142311a887b662c1c051d10f03d2cf5 SHA-256: 41169f42cdc20332eaf95bdeb70113154b7ee05def2f31768fa3815da41289e9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm pointing to compromised CMS uploads and potentially disposable hosting. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document instructs users to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or scam lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://allytemp.ru/uplcv?utm_term=que+es+un+slogan+pdf PDF link annotation
    • https://motelandratecuci.ro/userfiles/file/soredexujogeloloku.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/zulugizekavunekin.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161046d5c96e9b---tosewupoverewi.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/fc0q9mmtlusnrih4smjje1s009/xalexabolavagig.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/blh61uggf7aigrqh3fihqg607m/kugunupazirevokoj.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/cafe38a42a1b52c4002944730989bd3d/wegoliporadosuriz.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/9490a31d7d4229f7b59b9883aed24ed7/bujisogepejudu.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/3157973416.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ec9b695ac---93182137614.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132121141210---zukujez.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16126457f91b6a---dofiwovusurewobotofepa.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/98740023760.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/t772mk2fqb5rsi2c6nt3r1affq/9141941818.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b777c710673---76805321712.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/daxowodosebuvegit.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3e5d1e45f9---netuxutiziramuwaju.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/ee8c7790d478f11074a67e8543cf8bc7/95315690612.pdfIn PDF document text
    • http://lagerunda.it/public/upload/file/50980084050.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/xipij.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/71704049910.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad8c9f33e1---39824201938.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/mufebumovarijuzifa.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/gobizelufimuravoxusaxiwi.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/xilarixiwikitafobudobamav.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/575822155851620907328.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_off0000dc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC42 19164 bytes
SHA-256: a6ef5d327c868e0d4e210cf63a0d40b88ac8e7c76b0271a139f62acf08ed7aeb
font_01_sfnt_off00010cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12513 10544 bytes
SHA-256: 3e74fb600d5aa5018b16055697903c64e2182a87d204104cc12ccd542246a7fa

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