Malicious PDF — malware analysis report

Static analysis result for SHA-256 813ada7a15db3961…

MALICIOUS

PDF

71.8 KB Created: 2021-02-24 09:49:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d129af89f066ba8aab972bec6d2498f2 SHA-1: 5c7bea9c08fb9942dd73f3ac97ffd2f1cf0b2ab9 SHA-256: 813ada7a15db39611e39af9b9b3792c4abd389c4b61c99038d423488447fb13a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an external URI pointing to a suspicious domain, which is likely part of a phishing lure to trick users into downloading further malicious content. The document body, though heavily obfuscated, suggests a theme of free book downloads, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/aws?utm_term=bluford+high+series+books+online+free
    • http://ita-women.space/vogodifpfyhh.pdf
    • https://cdn.sqhk.co/petebeki/tgiNCEU/kiganusewidadaxanumes.pdf
    • http://stonersfranchise.com/google_live_earth_maps02d7s.pdf
    • https://cdn.sqhk.co/kixagixupo/dxhfgc2/smashing_pumpkins_mellon_collie_sequel.pdf
    • https://cdn.sqhk.co/guwaloxipete/ijgepjf/71828150711.pdf
    • https://cdn.sqhk.co/kasesiseb/CswQhcm/extinction_level_event_busta_rhymes.pdf
    • https://cdn.sqhk.co/javijaxim/gd91hjf/sixelidenalaridifuwo.pdf
    • http://akillidestekbasvuruformu.online/fizuwuladfyodk.pdf
    • https://cdn.sqhk.co/vilubofi/haigcie/xominedixetuduvetoboruv.pdf
    • https://cdn.sqhk.co/busumodofu/hjEuR4f/lurudemiv.pdf
    • https://cdn.sqhk.co/bewewojiwo/EohjjeW/nifusimijawibisajitaxiga.pdf
    • https://cdn.sqhk.co/sadirorig/SKmlgcK/tebozine.pdf
    • http://afracheat1.xyz/how_to_get_rust_off_grill_gratesg9zzk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wovigebi/sozedugifobogevawapew.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_off0000d0c6.bin
fd8bcb5488cbe2c4787f066d33ec6e12390ac66e61e7fc348ee6961dd2053051		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C6 5012 bytes
font_01_sfnt_off0000e1c3.bin
e1202e4539a2dfa11062c752b036910ce510adab95d4014c1732918d16250f7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C3 9976 bytes
font_02_sfnt_off000103dd.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103DD 4324 bytes

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