Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed3d4506e0a7809…

MALICIOUS

PDF

74.5 KB Created: 2021-09-08 09:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c0cf540f69bbf0c31eb5b3bcc4057d6e SHA-1: 8d2480e300430b748f743c68cf7cc65d37090db8 SHA-256: aed3d4506e0a78098215610419f0560d6c3989c8d4e0994ddd066795912fd678
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised or disposable domains, suggesting it's designed to lure users to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure indicates a link farm for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://alexdisinfestazioni.com/userfiles/files/zokixiwaputolibapeb.pdf In PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6133708438---tenulavuxiketuzisezoveli.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/mabanudekelepovumupuwev.pdfIn PDF document text
    • http://futsalcb.cz/picture/vtextu/file/tivilonot.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210808173508_ilie4r.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/52591800667.pdfIn PDF document text
    • http://ezibra.pl/upload//file/resizulapu.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/ddc8110bcdc8b2412e571414c355852b/45501498366.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/681d19894f61ebceeb23d20b9c712bd4/94143506254.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/wafavusen.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/t08dlncpg8ojo8iab1esbvt8f8/99181963926.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/79342840989.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161161e1fcec19---97915608554.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fba0acf3fed---53841182396.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/17253022283.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/5037891875.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/wurenudipema.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d8125cb96---39515336186.pdfIn PDF document text
    • http://envigest.cz/upload/file/bezizaniturutafazu.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaa1962a0c---jugeporetararixe.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/36818656572.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=pm+all+yojana+list+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_off0000b95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB95A 19952 bytes
SHA-256: f7b5b873e4c3e3acc9f9a1bfd2f9e45a5e93972b9777057113fc418296282744
font_01_sfnt_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 10672 bytes
SHA-256: 85acf1abb91c782f3ba6379dd8ffbcb009fee7c5b0ab0254534ac8d2c70b48f3
font_02_sfnt_off000104eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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