Malicious PDF — malware analysis report

Static analysis result for SHA-256 474bc447a71ef8ef…

MALICIOUS

PDF

77.9 KB Created: 2021-09-02 02:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a7444fae63314ba97f7d49ef89e49f62 SHA-1: c6b954aed1d19d56a184a285713ad25f6b064ce9 SHA-256: 474bc447a71ef8efa48ff89ecf45567605a374a438ef55a08c28f3ae0e882d3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS upload directories or disposable hosting. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further payloads. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://terhautz.com/upload_files/files/77031877759.pdf In PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/31581172505.pdfIn PDF document text
    • http://geoman.cz/data/file/4661685843.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e31f776a1---72948624151.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/67995261235.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b6c05c884---zukawop.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611809e57b2e5---12469046712.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/64802fb66be0bc38db40323781206f76/19626817992.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/cd834afd62b42f3436e2ebe6b4be3b47/nodoretikurepimeka.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/14189767031.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/siwuvilugemaxevapefatipu.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/d8a1052bbd83958ae79458452bc7aa8d/tibufuxaxejoja.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/0d9cc294bfa732e9835867070e571653/bajikametijos.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/56954398870.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/020554288790.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608f489059210---52586559990.pdfIn PDF document text
    • https://camelcarpet.org/d/files/15255629329.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/85720313745.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/mikinepolapexu.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/sesir.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/88437e4917ce8a3f28b3a3a6786a8b21/92826223984.pdfIn PDF document text
    • http://plastikacz.cz/soubory/files/50402329515.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=toms+stump+grindingPDF 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_off0000cd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55A 17392 bytes
SHA-256: 2c1265892136676a75d867efad25581cad8f7849820d3b7e78fe5d532db85dc4
font_02_sfnt_off00011236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11236 10460 bytes
SHA-256: 28564305e06d58b757b3f3043d7b4ce251a53cab3097b8f772c104f472f25660

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