Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03559806b2ae9bf…

MALICIOUS

PDF

77.0 KB Created: 2021-09-14 17:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5d6a8afebb620aa4c88486c7750e2672 SHA-1: 2b307a7b73ed4fb942a82f623b190d48ab1efcad SHA-256: d03559806b2ae9bfb2677e636f79677bcc0736dcd5c14e873a5f04cfe1127eed
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many pointing to compromised WordPress sites, and one directly to an IP address. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery, as suggested by the 'android security policy updates' lure in one of the URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://laborke.ru/uplcv?utm_term=android+security+policy+updates PDF link annotation
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff4713d487---jegibufaxupatavowubu.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/20334227372.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/60129041993.pdfIn PDF document text
    • http://konyanincigkoftecisi.com/userfiles/file/jamikumuduw.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/kumexepowalafona.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/bolajoj.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/18915210991.pdfPDF link annotation
    • https://organicfertilizerproduction.com/d/files/40277260216.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/34106989434.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/78566241742.pdfIn PDF document text
    • http://quranday.org/userfiles/file/vunabudozetur.pdfIn PDF document text
    • https://tectrongim.com/uploads/file/jiredat.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/33638950548.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb0e2e547d---negerizarijuwuf.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/161386c89b84bf---lanevumaniv.pdfIn PDF document text
    • http://coolbiotech.com/upload/files/jedosetukosozaluv.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/52853824543.pdfIn PDF document text
    • https://llbyggodesign.se/UserFiles/files/36484505353.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/26795789170.pdfIn PDF document text
    • http://dsagco.com/Upload/file/14243281069.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/wasoga.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/dewem.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/92206279812.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_off0000c9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A1 10700 bytes
SHA-256: f0231e658a85f578142e6cd94229352098395e0863c2609a0a049925dfd26097
font_01_sfnt_off0000e25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25E 16880 bytes
SHA-256: 89974b25f6530956d041228243adb35831400ebd295940263372b4c6a1879b56
font_02_sfnt_off00010e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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