Malicious PDF — malware analysis report

Static analysis result for SHA-256 74800ffea7a61500…

MALICIOUS

PDF

72.3 KB Created: 2021-09-19 13:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bbc62ae598981dc1de8513961f9a1c8a SHA-1: 94e3e7db2ecf57f28527e1973662f9aebac9d21b SHA-256: 74800ffea7a615003bf52dd15ca0f43222fb7d4d04e7634b5fa9270ab5919fb7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains a large number of embedded URLs, many of which point to disposable hosting and appear to be part of a link farm. The primary heuristic indicates the presence of external URIs, suggesting a redirection or download attempt. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=mulholland+drive+full+movie+watch+online+free PDF link annotation
    • https://phongkhamtamthan.net/uploadeditor/files/10717290967.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/20110800448.pdfIn PDF document text
    • http://huntland.hu/upload/file/44039596229.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/20796204389.pdfIn PDF document text
    • https://matratva.in/userfiles/file/wudovuxosazojid.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/39249901026.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/4838365030.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/laposexugonemitupa.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/62526285440.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/libinagoxesuditi.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/65163072585.pdfIn PDF document text
    • http://linyuepharm.com/upload/files/5033098812.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/52442912778.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b29fb17bfc---dosirebaxopezebefid.pdfIn PDF document text
    • http://rfaaa.com/UploadFile/file/20210917050913158.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/kopuregodik.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/48135668152.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/59008726541.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/30562000096.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/25038555833.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/97966477174.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161335a195a43a---22303926264.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_off0000b3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A7 17780 bytes
SHA-256: 5013b46adaa9cf6d4ceafea640b9bd3987267555fe28e50d1f36ed7b1a2413ad
font_01_sfnt_off0000e1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F4 10816 bytes
SHA-256: 4a0cd0814866df2257229315e1b29e81018003ff1fec4b151cbf63b9ac4d85c7
font_02_sfnt_off0000fac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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