Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ef770ef4270134…

MALICIOUS

PDF

72.9 KB Created: 2021-06-13 10:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3136f7e8f9240b9f1e8afbcabb54394a SHA-1: 7da0cc377133444dc361cb5b25e5021690672ef3 SHA-256: 74ef770ef42701343b9c96f7f220ef07a9e35ca015521a3deb989be91386e258
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'smidgel.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to 'Epson resetter key', indicating a social engineering tactic to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://smidgel.ru/pbw?utm_term=epson+resetter+key
    • https://cdn-cms.f-static.net/uploads/4417403/normal_60c317e4c015b.pdf
    • https://static.s123-cdn-static.com/uploads/4421768/normal_5ff6555acbf9e.pdf
    • https://cdn-cms.f-static.net/uploads/4387219/normal_605fbe3d6d4d1.pdf
    • https://cdn-cms.f-static.net/uploads/4413374/normal_602e32ddcda15.pdf
    • https://cdn-cms.f-static.net/uploads/4479923/normal_6013afa155633.pdf
    • https://cdn-cms.f-static.net/uploads/4453334/normal_60bd4945f29ab.pdf
    • https://cdn-cms.f-static.net/uploads/4470839/normal_60402b7b444ac.pdf
    • https://static.s123-cdn-static.com/uploads/4421783/normal_5ff14f1f98f0e.pdf
    • https://cdn-cms.f-static.net/uploads/4411490/normal_60ba4ffb72fd7.pdf
    • https://cdn-cms.f-static.net/uploads/4366042/normal_605942e2988e9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kigemulu.pbworks.com/w/file/fetch/144748068/wowekamum.pdf
    • http://fudejob.pbworks.com/f/tonowufurogulasu.pdf
    • http://duwaxifu.pbworks.com/f/crayon_shin_chan_fast_asleep_full_movie_in_tamil.pdf
    • https://uploads.strikinglycdn.com/files/54c05c79-36ca-4779-87e7-145dbfc919fa/how_to_pair_yurbuds.pdf
    • https://uploads.strikinglycdn.com/files/c1b124fb-f553-4913-bec9-7722a54948e1/46012871698.pdf
    • http://tusawijer.pbworks.com/w/file/fetch/144453456/alchimistul_free.pdf
    • https://uploads.strikinglycdn.com/files/f90717ba-99a1-4ade-a0f7-585d1c212d52/rojugevipuf.pdf
    • http://lodedeti.pbworks.com/f/4535635233.pdf
    • http://viluxese.pbworks.com/f/nasexilo.pdf
    • http://rasovuxosew.pbworks.com/w/file/fetch/144563925/16828950508.pdf
    • http://pevozowo.pbworks.com/w/file/fetch/144875256/cheats_for_ps4_warzone__50____Low__15.pdf
    • http://zudilazo.pbworks.com/f/pptx_to_converter_online.pdf
    • http://golepuvarilo.pbworks.com/f/pokemon_white_download_rom.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e039.bin
41591022602cca927d33df248c2eb40f09eda897e2c385629975c7c92c11ce66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE039 4692 bytes
font_01_sfnt_off0000f04c.bin
89973ba85cf4a56695aaa1a472bb9ae1ae4095e8cf4dedd37d07005a1a4423a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 11232 bytes

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