Malicious PDF — malware analysis report

Static analysis result for SHA-256 2257864032dda7c5…

MALICIOUS

PDF

79.6 KB Created: 2021-09-04 12:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5f0ecf3bf4d66c9bd78ccd6e674d87f2 SHA-1: b3643780d55e64c7c2665ab6ef506e79ba23d538 SHA-256: 2257864032dda7c55e19eb0b31ea3085a2a46fbb8883f70f4f33bde51abe01e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised CMS platforms. The presence of multiple links and the nature of the URLs suggest an attempt to distribute further malicious content or phish for information. No scripts were extracted, but the overall structure points to a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://studioguidobarbieri.it/userfiles/files/misimovud.pdf In PDF document text
    • https://kham.vn/userfiles/file/23490770521.pdfIn PDF document text
    • https://hirurgija.me/files/bowapagitomotajiletilevo.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c7ca9f881---16416476481.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/49520736883.pdfIn PDF document text
    • https://mfdesign.hu/files/file/dutakevemalutetijoxas.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/genofagesosi.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c455d30f746---60847277907.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/81087128106.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad995e02ddb---fiforotelefapipoxik.pdfIn PDF document text
    • https://journalofcritique.com/ckdosyalari/upload/files/34199342002.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/39502369033.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/f8105f1591f87ff6d5ed547f01d72461/78328048393.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/vokimo.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/68380326805.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/82053529420.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/dezek.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/82264452268.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/56bfdfbf3370196914ebf928abe2d9a9/rewopevorasedegaj.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5aa063447---35224309953.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41701774702.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/ce204e285456737e589dd440c1011826/35502149239.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fd84bd757762ebaec6f11215d7853d0c/96286530992.pdfIn PDF document text
    • http://ashioke.com/images/library/File/70458657705.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160995a34c66ef---nedukutumonakedex.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a0b79e92cf9308b65318a6a61b73a0a2/18386084129.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=arc+length+calculus+pdfPDF 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_off0000ce2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2D 18956 bytes
SHA-256: f84322c40e2d7c3030ea3a7854147af9d29e06bbdf69429dbb730542a69a4cbe
font_01_sfnt_off0000ffb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 10768 bytes
SHA-256: b774424e8c752c59f95cea77009b5ea936444a44e4ca048875d4bde2206c4aca
font_02_sfnt_off00011842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11842 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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