Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d0c868480562e5…

MALICIOUS

PDF

84.7 KB Created: 2021-08-06 17:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2cd68c9baa2f7dbd4bc1d07765d1c1ff SHA-1: 3b65e08d434df8389a14b541f1d6a2a9a33540e4 SHA-256: 88d0c868480562e567e655ae5852b2fac1a151354970c79e6b3ad2014b189473
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure suggests it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://faw-asia.com/image/upload/files/8097789249.pdf In PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/3e6256e2b6a3ce90f844133e8908f9cf/wigerojowazitodeboruvi.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609923c142c1a---51865424164.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/16429716365.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/4f3a3e081e63e9135aecf5752e6f8f74/73286997591.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41f2b61fc---maxuredadevogoj.pdfIn PDF document text
    • https://eubeer.vn/uploads/files/lofafomiwasitemaneri.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa16f27645a---vobirazijovutonimivezafut.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607738451ee7d---tidisizazefibiv.pdfIn PDF document text
    • https://bloc-immo.com/images/jaxemajuwuxujavifusawunu.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/magiveziluwiwev.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e89b009fcb7---26625314434.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa7fe875a3---24995230254.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/lujezivizegutoloke.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/57879965321.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/1c1f88d5a7f1530c6bea9ce3d83733a5/88128390150.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/sanevuxenufarofexiratan.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa9600526c4---33352001177.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/20939045744.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/73460894808.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0a2rpc2hsj2ep1vjqta6tjupa2/73923447037.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/fudoroka.pdfIn PDF document text
    • http://santeh.md/img/files/4731394440.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9e0c2e967---65376620450.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+use+delonghi+portable+air+conditionerPDF 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_off0000e70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 11112 bytes
SHA-256: 49a396675585b28fed073d4d0f8341752423bf324225c32e16942fd13556a4c3
font_02_sfnt_off0001188d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188D 16264 bytes
SHA-256: ec52cb0f2da16333183a87314d85a12379133b4fccbe91aab2f5905b40b252a2

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