Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc9c540a595b0c1…

MALICIOUS

PDF

88.5 KB Created: 2021-04-06 11:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3164b5277fd94523603a98dce13103f SHA-1: 816b96e676c920136ad31cb691321a0dd61cf8c0 SHA-256: ccc9c540a595b0c10c19c28aa3f001c1ccbb575cf09767c8c4f98e4304e909d3
96 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host malicious content or phishing pages. The document body, though partially corrupted, suggests a lure related to a map of Honduras.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/wix?keyword=mapa+de+honduras+con+departamentos+y+cabeceras
    • http://tujidal.mypressonline.com/schaum_outline_series_set_theory.pdf
    • https://cdn-cms.f-static.net/uploads/4367668/normal_6031648deb47f.pdf
    • https://static.s123-cdn-static.com/uploads/4476140/normal_5fe152043f600.pdf
    • http://lobabinuladeri.medianewsonline.com/sony_str-dn1050_firmware_update.pdf
    • https://cdn-cms.f-static.net/uploads/4417530/normal_6022e7017e762.pdf
    • http://starconflict-game.ru/nujuwefowosuwesk5ivl.pdf
    • http://copyrighthelp.info/antigone_scene_2_analysisc9lza.pdf
    • http://goodsfor.life/how_to_stop_global_warming_as_a_kidy8a0p.pdf
    • https://cdn-cms.f-static.net/uploads/4419857/normal_60144e893d2ba.pdf
    • https://static.s123-cdn-static.com/uploads/4449992/normal_5fca783133f51.pdf
    • https://cdn-cms.f-static.net/uploads/4475739/normal_601463991fc0c.pdf
    • https://static.s123-cdn-static.com/uploads/4459929/normal_5fc99cf8432ac.pdf
    • https://cdn-cms.f-static.net/uploads/4493195/normal_6034541cb4e1d.pdf
    • http://bathforlegs.xyz/what_are_the_greek_symbols_in_statisticsu40kh.pdf
    • https://static.s123-cdn-static.com/uploads/4446930/normal_6003f31d9285e.pdf
    • http://tufepuwaw.iblogger.org/binomial_expansion_problems.pdf
    • http://hyipinvest.site/koseruporug4t3l8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bepelugokuzo.rf.gd/a_night_out_harold_pinter.pdf
    • http://guxejusoselota.myartsonline.com/file_khng_in_c_lm_sao.pdf
    • http://meguwuzib.rf.gd/deferred_tax_balance_sheet_liabilities.pdf
    • http://majezomisi.myartsonline.com/karmasangsthan_bengali_paper_download.pdf
    • http://wumurunapaxilar.rf.gd/sat_preparation_classes_in_delhi.pdf
    • http://vokesakogo.onlinewebshop.net/sonig.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_off000117fd.bin
426921a602f7f20db206ed4a976450285b03711f6b507fd340ae68a685f3cd7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x117FD 5528 bytes
font_01_sfnt_off00012aaa.bin
644aee593aec51be4d05e71ce582baaab0f465000f8294a8c40a661619cdb4bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAA 12592 bytes