Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7f10156c9e7b6e…

MALICIOUS

PDF

84.5 KB Created: 2021-06-12 22:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10d5d09616c449986a680b46811f3935 SHA-1: c6fc77ec12d76b875ee9a01e33dc1bbf0f962c8e SHA-256: 1c7f10156c9e7b6e1044accc82fbb10d83b71d7191eed365a3c28bef8221de62
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, suggesting the primary purpose is to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=young+nude+anime
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea0e1e44a4---97396038912.pdf
    • http://agcslohian.com/userfiles/file/43461021062.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/cj317lnhck7j6qb0omlh8kaam5/24695197224.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/ddahfthfgvv4pli56iqj5s27a6/94054893699.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/bdc7aa2fd34b0f3085a6d97e885be665/viwubosorozelurarovekajor.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/89e271acf20ba4de93e73340e3792e74/2538081481.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c92fe8d67---derafobarufujev.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609dda76b12bf---xugusoleno.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/44lq2ubbm775ltjmooc4t27g60/66586483991.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b36e96166---motidowarulimogej.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16071735ce2f1b---6680383447.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/ae3b0c69202d3acbb78a3ded804f82d3/pizusimupixidegepowa.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/r895vi7ckid5kob1uibi8htpc7/lexirakonujawizarigikuga.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/39d9b9e6c9f7c590a48593f75c509c89/gakogoke.pdf
    • https://mimpishio2.net/contents//files/55147418642.pdf
    • https://alajuusa.ee/media/contents/file/fexodari.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866a5307cd3---12149155045.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/f19b26737d1d3eb09087f70ffd25cc55/devidiritom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104ba.bin
ee5d4df25cb77c947b82aaef2a0c4cc99e10e58c77e5af6fdace869abed0a4ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x104BA 3292 bytes
font_01_sfnt_off0001107c.bin
0d3aa09ae3bee96b9e8c8e243084ab5e65d0407bd8368ed013298c9d864a0059
pdf-font-stream PDF embedded font (sfnt) at offset 0x1107C 4800 bytes
font_02_sfnt_off000120c3.bin
6d3d419e7c7cc69dc8c5b2c92b9352ee5f21a872ab9e99ddbe80d9adedcf22a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x120C3 10540 bytes