Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f042ea889954c5…

MALICIOUS

PDF

98.2 KB Created: 2021-09-05 16:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 83faf5fb5c551c9f2f1197005dadb2b8 SHA-1: 04c76df852269ad2099fc7c2139b3cbbf0ce228f SHA-256: d1f042ea889954c510222be372243fb06cb6e30d66becc2fc3f81d6a97b46af8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://allytemp.ru/uplcv?utm_term=sa+whitebook+pdf PDF link annotation
    • https://dnmpaint.com/sdcc/images/file/nisuxarewimilif.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/lulibodufilakipag.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/83957578460.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1629709278.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088004582d64---11070863887.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160821d832762a---58527344424.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607641d4f4062---laxigerelulevuridejiji.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/40204102439.pdfIn PDF document text
    • http://inphuduong.vn/upload/files/64135413745.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/fijemojelap.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/pagujevotaverutowavimuzix.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/5ec6215136eaafd7ad73ce49b0f740dd/momikumoj.pdfIn PDF document text
    • http://93564497.com/userfiles/15683973693.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/fba090786563164fddec9d747300c67b/38811206505.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/91593766258.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f28226914e3---disegopifabuzabamukimorax.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/tuvunu.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1565df455---97331063875.pdfIn PDF document text
    • https://chp-travel.ir/data/file/38641663741.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/75566015188.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/pezuzeferamuwozavajibe.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/og5l1i8g3a0slq33j14lke57bm/vuxixixonoliliwotoxap.pdfIn PDF document text
    • http://zimmerei-possert.at/77293561798.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/gokinukisavaxup.pdfIn PDF document text
    • 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_off00011183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11183 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001299a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299A 10568 bytes
SHA-256: c6e385e196f6c4845012af2a05fc065885a387223cc31256be65b12d6ab933df
font_02_sfnt_off000141b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B6 21428 bytes
SHA-256: d551b23a48761e4cce1398873c7e64c9a48333b62e2fb23703f0ef8453214fa6

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