Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b29c265f412ba25…

MALICIOUS

PDF

89.1 KB Created: 2021-07-16 20:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5e262274265fdbb94c74eea3238d5ee3 SHA-1: ce593cadc53c8ce8a7c4e9a564e16b5742e1159f SHA-256: 2b29c265f412ba25a248a1732135e3d8684776a6216aa2ea43bacc37a12519bb
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting it's part of a link farm designed to redirect users. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://avigailpekelman.com/sites/default/files/file/joroxulipovopewaruz.pdf In PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073279748372---5660955622.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/4155891798.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/jizetaje.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/e017333d1ebd20312fd1348d7a3d9675/33238569898.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ff4a0c533---zekazinibadopikef.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0f39ec4b89a192447169aad5dc08c467/fobamotizifivuzeg.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/68301056822.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ecab77415---98590939773.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e25ed953c---32442077269.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/limowem.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/55904424808.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c7e529753---mixoravaru.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/xigakegonuxavidifezoteviw.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/tidelorukaxuguwibufuxode.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b64d5fbc0f3---84571286010.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609273e4d07b0---siraburilikazibawo.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/r0au8bj44f0r7e51kl12juefno/tebigipupelinuv.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/20148849294.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/31431158404.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f0ce83d170d---vixadewutikikuritukote.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/46690984592.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/zinusimovajunukakuda.pdfIn PDF document text
    • http://strandedtattoo.com/file/wiwix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=syllables+in+childPDF 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_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 10480 bytes
SHA-256: 62f02bb9fcadf25ec58d7ee7c62227bb5110dfb2b7cbee86615cbeba76464daa
font_01_sfnt_off000111ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AE 17380 bytes
SHA-256: 7f320d3d8267147f32ba658931e128e66b9e4e5008d6c70155617f0fdb607898
font_02_sfnt_off00013f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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