Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03952d42c3bc8e1…

MALICIOUS

PDF

83.3 KB Created: 2021-06-27 22:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be98e7c45e436ff0ce05b60c7fc9d9a0 SHA-1: c260e427ec763affc970ad3dbfb18e397c5c2451 SHA-256: d03952d42c3bc8e151c361fa2d067092f0e61e7d0ccfa133a4d09bf1937205df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to phishing or malware-laden content. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/e30d85487a18f1a439c22f7d7234bfb1/rilavajuvubuk.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/pb5oqtddtu1pjgnf7i5lc5baet/4959211100.pdf
    • http://kojeneckezbozi.eu/userfiles/file/91099685365.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071c3ca20e7b---17460792000.pdf
    • https://highrise.pl/file/jebiluvijiredokafogovele.pdf
    • http://symbioticlifetech.org/attfile/fckimg/file///2021062218420_220215641.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cfcf413c1---15919354261.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/hd6bk5oq8qsit0ojgbrdcin51u/19863785258.pdf
    • https://anjingliar.com/contents//files/84311575026.pdf
    • http://aggengr.com/uploads/CMS/file/fenojejekalavufepeso.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/lg7uv26v2hp8u9a650289ocg66/bigigafikawalo.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946b8eeddd3---99234093957.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ca006174a---64963955985.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/adaktutcftu43nk1to9c695ah3/80200815198.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6254a003a7fa55038c1e92ae9c5644c8/molubojowowixejoda.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nto95lmj4rsbuficapoegs2s75/libuzapefunizakawugexug.pdf
    • https://vinadesigndanang.vn/uploads/image/files/87384383258.pdf
    • https://sfeerweter.nl/userfiles/files/dufogu.pdf
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/mejanexevowinavasuvesawaf.pdf
    • https://tractorpulling-emmeloord.nl/upload/file/90988575905.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/hjphtb0clsk3e4f1judf850qtd/jelupimexelab.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cb749fc90---kuwetak.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1609d155e59e8a---buvor.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/jjv7bh91c71sa5uii80e4d1u4v/jopakupud.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=three+phase+fully+controlled+bridge+converter
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de51.bin
1ac05ee971f14d015e9e378db9a6ecd3c580b0ac488576d636a68bbf64a3b527
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 11284 bytes
font_01_sfnt_off0000f868.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 16792 bytes
font_02_sfnt_off0001107a.bin
8b59bffa45d14eb47f541ac150157741dc693e2a572046c6bec95fa8f8afa357
pdf-font-stream PDF embedded font (sfnt) at offset 0x1107A 17300 bytes