Malicious PDF — malware analysis report

Static analysis result for SHA-256 de686a25fedcc14d…

MALICIOUS

PDF

76.8 KB Created: 2021-02-22 01:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1271ff8b076f8e82e296a76af5318dda SHA-1: 3daa8190823a962c95117f187454d22f7a4a4626 SHA-256: de686a25fedcc14d95cd70134c0eef4179caf08dbd2875fe105d1f615c22848a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file. The document body, though partially corrupted, suggests a lure related to academic content, likely to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://jacksth.ru/wix?keyword=coordinate+covalent+bonds+pages+223-225+answers
    • http://skidki-day.site/puzzle_bobble_2_character_select5s2el.pdf
    • http://m-ryanaf.site/94257308496pm49t.pdf
    • http://ketrovk.xyz/gadawinafaxedumujogexoxoz3ml6j.pdf
    • https://rusipamisu.weebly.com/uploads/1/3/4/0/134017355/9719058.pdf
    • https://cdn.sqhk.co/lawafopugu/SshhAhj/tekixijara.pdf
    • https://xoxigukot.weebly.com/uploads/1/3/4/8/134861038/0953d.pdf
    • http://pro-konditer.com/rilogekeoety7.pdf
    • http://amaryllis.space/916540407562nxie.pdf
    • http://itsnat.space/77479262230timea.pdf
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/696439d95b07.pdf
    • https://jugijivarute.weebly.com/uploads/1/3/4/6/134620481/559860.pdf
    • http://hookup153.space/what_does_the_child_say_in_mandalorianzt01i.pdf
    • http://50offstore.info/3941857573e0ddt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tubukeganuji/billi_akh_video_song_djpunjab.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_off0000e076.bin
0db5196420bdd23789a84970199eb516aed5f7f6c6008480fc00f0a94e9d1c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 5796 bytes
font_01_sfnt_off0000f459.bin
18c073a4aab857b28fa34acc2ab033069ea62c4d9c7ec96ad461bd38a79a3aae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 10264 bytes
font_02_sfnt_off00011780.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11780 4324 bytes

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