Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f4e7d5ff87c0dc…

MALICIOUS

PDF

74.6 KB Created: 2021-05-25 05:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eebc0d167c9543d309f8b87a1f5a61e6 SHA-1: 8cf086165573899c521286cc4c1ef1b063547ed9 SHA-256: 47f4e7d5ff87c0dc8447f2f544335942d390eb9ca0ff56272dee3108c136eb8b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

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://baoholaodong24.com/userfiles/file/36494821914.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/86429e4427df455b736e2818d8f3118d/xujezenirepasipabog.pdf
    • http://www.deep2001.com/images/library/File/xowumawavuwuwop.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160968a3f43492---14054789520.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5e77387ab---befefifodeb.pdf
    • http://bajcsidavidfoto.com/_user/file/55904871907.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a47ec08cd---92633393709.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a55777a1c1---xowujusovuvizezor.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607714ed08731---94813785119.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/9282ca66c5ac9c0c87342df85cb4849c/pobuxunemenajapaj.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/7a06bc7b61dff1f13bcc02b688b261fb/4787145978.pdf
    • http://jar-ted.pl/file/80826233764.pdf
    • https://betenagro.com/sites/default/files/file/bopuzitonodobemobawejo.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609657f5af8be---44353487114.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/4i1nq1mpu8vvjg2epgpvh820h0/87155805596.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=free+fire+mod+apk+unlimited+coins+and+diamonds+download+apkpure
    • 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_off0000d7cd.bin
5a80b89830a074a58f56bc5d2a74c5eec71200207a375759f50d947bd1049e9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CD 5296 bytes
font_01_sfnt_off0000e9cb.bin
5670ab56c4b16c1e6ae13737a03406b0040fbc39091e01d8d59fbb476dc14d00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CB 10384 bytes
font_02_sfnt_off00010d1a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1A 4324 bytes

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