Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f804686a6cc745c…

MALICIOUS

PDF

80.0 KB Created: 2021-09-20 12:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 191366f976c547fba6877649ab4c2e56 SHA-1: d9bdb4d68de6e8c5604377f429098d453c78e88d SHA-256: 6f804686a6cc745cab961153473acf861dc70a3b6b33ff7f8d0c1d62d82a1b06
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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 http://modernplating.com/userfiles/file/tarekerurud.pdf In PDF document text
    • http://handbook.hu/upload/page/file/mezusuw.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/a5f2bfcb9a585ea50c6e65549084bb77/97433638169.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210916183323.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/1f7f0b828c44a084e18ab84085082279/17510692886.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/51448634529.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/xonifogekomax.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16140793a03822---81860210830.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021090222580173499.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/4antr43rfe3727fnig181lgpjc/bulakobavume.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/89287016825.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613d165319fe7---99324765082.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/91476942847.pdfIn PDF document text
    • https://nsaimmigration.com/userfiles/file/34574793706.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/80670426191.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144a6ca3ed44---35454078086.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/47114716257.pdfIn PDF document text
    • http://www.juthamasclinic.com/upload/finder/files/51442055208.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/dipezilizupesujolesinaj.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/15923378889.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/96535898127.pdfIn PDF document text
    • https://ibexquimica.com.br/ckfinder/userfiles/files/sonebumutomesemad.pdfIn PDF document text
    • http://mebco.ru/images/file/72954990133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=things+i+should+build+in+minecraftPDF 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_off0000d3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DE 17192 bytes
SHA-256: e4b61a7246eebf55e044dbcbf2633d35166987ab86d0a770e953315cb5bdd64e
font_01_sfnt_off0001006e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11885 11128 bytes
SHA-256: 62f986ae636e1d47e9bdc292c368225302499a99582939bf3c09b2d001cb6a23

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