Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd8803ccd1a8c01…

MALICIOUS

PDF

84.3 KB Created: 2021-03-13 15:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cecdfc33803ccbfbe56a37e6d3158d9b SHA-1: 19e5a1d40ace2ce881d860825567fd8b3619048c SHA-256: 5cd8803ccd1a8c012ee92562b8d5a4b61ae82c9a474c68e5901ffb52cb09aafe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links likely serve to direct users to various websites, potentially for phishing or ad fraud. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=84+charing+cross+road+book+pdf
    • http://vojiwilobir.22web.org/g._d._c._a_full_form.pdf
    • https://bugajikiwolano.weebly.com/uploads/1/3/4/4/134471946/kobopilome.pdf
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/vajawetojuxoga-semabomobimuve-jagepeliziluz.pdf
    • https://nategenuniko.weebly.com/uploads/1/3/4/7/134749174/9355605.pdf
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/tonewuke.pdf
    • https://baxinumep.weebly.com/uploads/1/3/4/3/134366260/nupegajulozeriveteru.pdf
    • https://wifamiwipefap.weebly.com/uploads/1/3/0/7/130738562/bopetizodoteku.pdf
    • http://pusolaxunu.66ghz.com/sentry_safe_combination_codes.pdf
    • http://topsale.pro/94211403593bbyro.pdf
    • https://minoximamus.weebly.com/uploads/1/3/1/4/131437876/lapiwo.pdf
    • http://creditreportusa.info/jokekuxipurosenuririlajoz23qt7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://larazegabolulaf.epizy.com/one_piece_bounty_rush_reroll_guide.pdf
    • https://s3.amazonaws.com/savifin/dbf_file_format_reader.pdf
    • https://s3.amazonaws.com/sobaketemu/66865641660.pdf
    • http://luwegovufa.epizy.com/dajezusozorapujapuledev.pdf
    • https://s3.amazonaws.com/ravuxudibure/shaw_academy_certificate.pdf
    • https://s3.amazonaws.com/rozebofukixus/mewero.pdf
    • https://s3.amazonaws.com/tonemakopinibem/votivu.pdf
    • https://s3.amazonaws.com/dosalapasenow/win_brian_mcknight_song.pdf
    • http://sidajewaset.epizy.com/tijokufuxa.pdf
    • https://s3.amazonaws.com/budovewesekaz/97341546504.pdf
    • https://s3.amazonaws.com/sefiwegegagu/71313730006.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f718.bin
885f447728ba91d9f05d4323950a54da3b1479642543c9d3b8f58dc0dc83300c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF718 5272 bytes
font_01_sfnt_off00010943.bin
f0ae4ec37e05908870c2b310f8893a881ae5b48ed5fe0aef4d45be97540ed6f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10943 5776 bytes
font_02_sfnt_off00011ce7.bin
aaaeaf38e7f7aadd0d80af9c36f320028f8c7d405d62e3bdfac3d28942099e24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE7 11304 bytes

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