Malicious PDF — malware analysis report

Static analysis result for SHA-256 6282d105217ef322…

MALICIOUS

PDF

78.8 KB Created: 2021-09-02 15:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4c3dccccdd3b8d78d2dba0fcd62c34dc SHA-1: 7ea8e98c33d1652560347ba04b04b87ec0e30c9b SHA-256: 6282d105217ef322f063e0accd7ac79d7d3b43c91c6991c3d008c6100abbbbef
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no further context on its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=basic+biomechanics+of+the+musculoskeletal+system+nordin+pdf PDF link annotation
    • http://vetranhtuong.info/luutru/files/bedefeleb.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/dadufigosidetulu.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/sizisiwiwisuluzukod.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/3frmlok7rt97ak65a3ceu223e9/popuridujekatelil.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/a6e9i9881605n9cqr7hrgoel80/13662013599.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/jekaboga.pdfIn PDF document text
    • https://mavibusiness.it/file/7029213776.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adce7feebe8---8741943703.pdfIn PDF document text
    • http://babamoleskine.com/files/file/13581537179.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/81744498209.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ccktdol5velnk5knfdb2mltld0/26716250316.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a607fe36c32---44441654051.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/95011303644.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be10c0ace2b---saveliruxuxugum.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/06e9f517b3983ccfce448057da80c186/42568680680.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/8qr9qc80gvdcjss4vbj92h3t66/65879075788.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/rujenivajoxiloro.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/zumaxoradunitebaguvube.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/1245c3092d579611dc12add22ac26271/kijobas.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/h2ru3dsejehspflbs2ulcd6adf/bilozakixoj.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612761dd71ced---17590291441.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_off0000cbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEA 17936 bytes
SHA-256: 1d951388961a6457a953812c7a3096ec2db23de21295535a2260fe6fb720e7b9
font_01_sfnt_off0000faa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA5 11384 bytes
SHA-256: c269dcc9ad744586e0b6620d879c18186f04b0d2dcc7e5b29c5b57aabf0649e7
font_02_sfnt_off00011522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11522 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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