Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad2c038804125a9…

MALICIOUS

PDF

69.0 KB Created: 2021-09-19 02:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 34a161f0e32a6edae704a7386e50eb33 SHA-1: c0dd07393e6ecd4e355a2f0ab4e0d26e42a026df SHA-256: dad2c038804125a9bb4816fc0abe1b368008bc9da3246a25280566d9c797c30a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/df63d7e501c4ecc2fff2f90963ca3516/26507546132.pdf In PDF document text
    • http://duancanhotot.com/upload/files/tilovututoposuralezab.pdfIn PDF document text
    • https://mlspoland.co/files/file/fajojunesojevev.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/90487193412.pdfIn PDF document text
    • https://coil.hk/upload/files/jumomobokesezojuvugugami.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/91155965672.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/71517520432.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/48791605371.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/40209274722.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-1/20210901110834515231.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/xogubiro.pdfIn PDF document text
    • https://nepalihemp.com/ckfinder/userfiles/files/72820371253.pdfIn PDF document text
    • http://baominhlabors.com/upload/files/roletunujixemanosilurune.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94912274084.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/86048811958.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/2mm8orkjl0f749gtlufmv2q1g5/dexexasesarodobiviso.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/sikefotinurinipegote.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/7dae10821290b5266a4b918f153cf597/52069129463.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210910_809675C930EE7BE8.pdfIn PDF document text
    • http://vaynhanh365.net/contents/files/56623449817.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/77740687774.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/7f4611b23be02ae1554e650687572322/newaguduledoxegum.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/80182653337.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/80065480925.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=android+version+10+namePDF 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_off0000b243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB243 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA55 14640 bytes
SHA-256: 221dd13779af211e07ddf06b7e3f7175d0472da7e8d7b84ea4688b8e1d6d4358
font_02_sfnt_off0000ef37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF37 10484 bytes
SHA-256: 09474de62742971df7b7757d02eaa872b9dad01c47288ab1d2240c729a693fe6

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