Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f0ac035b049561…

MALICIOUS

PDF

82.1 KB Created: 2021-08-24 17:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0cea11482a418a843c18e12914569ba3 SHA-1: a23eb46f6ce640a96ead89424dc2beca7313436f SHA-256: 19f0ac035b049561ac0a9ab24ad347ca23dba9f856c7f82b6b2bc2979323cd8d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous URLs pointing to compromised WordPress upload storage and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to deliver phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://wastran.ru/uplcv?utm_term=old+people+skiing PDF link annotation
    • https://hissekurban.com/resimler/files/ligimigojulos.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/vazenozamevabobaxivero.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/f76kib6qkat10n2lks2nvvdo74/99205659756.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/23367095271.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/82446310807.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/23008958571.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16095abb45a6f8---41993271871.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/berev.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607a904946c78---69372581942.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/guxedufegubaluxafukisuma.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16111ca8108d03---40589033496.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/jukok.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/63436742876.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8ae530d6e---nezisofus.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/17f1b44671e6ce51f5aea6dddaefde89/58485433270.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/45713373525.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/cefa8f424a7f2c1bc7e6f59f4969b579/nigito.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/58e80ed487ed1511224545111b3f230d/zifofe.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/2j9h2hk6niclstv01sduh1h9c4/34578152958.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/90c56e1cea803c01bf0ed02048e41045/65001450414.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160de1c809dfd3---81199366312.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e689bf297---48212712485.pdfIn PDF document text
    • https://anfauglir.com/images/file/wanozolepajenuze.pdfIn PDF document text
    • https://csodamalom.hu/files/files/wuminap.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/dugodawukuru.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/69395569013.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_off0000e11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92F 16640 bytes
SHA-256: 0f300421bdc873ddd4ddd6331cbc192ce2c23360aa5bf80f3005361e5d504dfa
font_02_sfnt_off000123ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123ED 10324 bytes
SHA-256: e35bd1b4181fc17a7efe68c8eaf325dde17d8a36d5c130d46402feb0a64bddbd

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