Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db5de3f2816d450…

MALICIOUS

PDF

75.6 KB Created: 2021-01-20 06:00:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45d55b3faa805e7e85cc93ee8fdf11c0 SHA-1: 58d74f6391a738349f60459d277d58ea46d029c7 SHA-256: 6db5de3f2816d450c79b29b13db461aba4b0bbb3a3c15e535a74a263490c68af
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though truncated, suggests a lure for a free download of 'Projekt 1065'. The presence of embedded URLs, including one pointing to 'jacksth.ru', further supports the phishing or malware distribution vector. No scripts were extracted, but the overall structure and URL findings point to a phishing attempt designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/123?utm_term=projekt+1065+pdf+free+download
    • http://roxobupupop.22web.org/kalonifurawuzudiwuxifa.pdf
    • https://site-1185553.mozfiles.com/files/1185553/toca_life_town_apkpure.pdf
    • https://site-1205711.mozfiles.com/files/1205711/96978973254.pdf
    • https://site-1174999.mozfiles.com/files/1174999/psychological_barriers_in_communication.pdf
    • https://site-1172701.mozfiles.com/files/1172701/battle_simulator_pokemon.pdf
    • https://static.s123-cdn-static.com/uploads/4374704/normal_5ffed095e9f54.pdf
    • https://site-1173288.mozfiles.com/files/1173288/16670680387.pdf
    • https://site-1260005.mozfiles.com/files/1260005/duracell_cr2032_battery_datasheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dotivaf/bajajif.pdf
    • https://s3.amazonaws.com/juduk/artifactory_rest_api_latest_snapshot.pdf
    • https://s3.amazonaws.com/sojebelevenex/27948222395.pdf
    • https://s3.amazonaws.com/tetazino/54690736214.pdf
    • https://s3.amazonaws.com/xoxaneral/sowobetegevitetetap.pdf
    • https://s3.amazonaws.com/kewakuko/macaw_bird_png.pdf
    • http://jidabalelibixu.rf.gd/kijeduvukovul.pdf
    • https://s3.amazonaws.com/ninazarila/gaxelodidojugilo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c092.bin
6193ae5e1ba9309bf1242d6e0a406601078bce13db99ffdf9b0cff6bbb146ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC092 2948 bytes
font_01_sfnt_off0000cb17.bin
8afa3c3573bd0a7ecd42bfe2f926423f611f1d6b95ed5695cecbbf5b294a8354		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB17 5560 bytes
font_02_sfnt_off0000de35.bin
d36471a91ac2fe1246e4423926d179be2d38c0457ac73d5392e06dda7643be1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE35 11200 bytes
font_03_sfnt_off000104a7.bin
a9b5fba632a94d14e4dc807fd51f6473c95fa9055f5c804cb48606bbc17ef9fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 18228 bytes

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