Malicious PDF — malware analysis report

Static analysis result for SHA-256 1210a480dbe53331…

MALICIOUS

PDF

109.7 KB Created: 2021-06-30 06:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2bd9e5bcd5363c8eb122bce91a3869ac SHA-1: 15b9ce08d713cbf1cc330d692d038644b7242dd1 SHA-256: 1210a480dbe5333171012f4b740dfcf8c1e7e0db9a115afc610abd8d99e6698d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to compromised WordPress sites and IP addresses, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and embedded links are indicative of a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/d48cdf2e63589c63a6c36d539b5206a0/pebadajoz.pdf In PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc350267b6---37539678288.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb93a3fb05---72853944921.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/28800470917.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd7b6cf34b---tadopoferixosimuterob.pdfIn PDF document text
    • http://rapet.hu/files/71411258377.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/10e38f9a45edbbce9d7d8a35cce03b13/93805952069.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/7f01342a8cde1e6447bc764863524942/59993823471.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609adef45f394---47731157977.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c7187ce57---sevitadalupak.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608315b6dfab5---xipigodom.pdfIn PDF document text
    • https://abeess.com/userfiles/file/malugixunefazorojudob.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b7def4b8c83---wekoxalijolesirubapuzoti.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/7aidkunvkb4st2p4mf08fchcmg/39845421219.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6642ae3d49---notavax.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/54340814838.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/6rjpptv3rp80njh0rtfdd8njt0/35975170211.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/37873d20a2551f10846fde61a8cd7d0a/55602432798.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/df00f29ecd0a86fa1cabd6995be41b1e/xanilokuvidiwuvodivubakar.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/44f08a08a06170ee630651cc4c703f09/26406496590.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/kasaduneguze.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b98df268fe9---xamefaliwidopab.pdfPDF link annotation
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021060906132780554.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=english+vocabulary+in+use+advanced+keysPDF 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_off00014338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14338 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B4A 19884 bytes
SHA-256: 0870a777c35d8da073b5697bd0ab0ec1a90cc002875dde4c36736a584bdc3b7c
font_02_sfnt_off00018e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E56 11048 bytes
SHA-256: 467223b0121c53923305fded87bf700c3262326608bcaa7375be188eb26d8735

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