Malicious PDF — malware analysis report

Static analysis result for SHA-256 889caec526437ecf…

MALICIOUS

PDF

118.7 KB Created: 2021-03-17 03:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b7d5ca58a0290527e9e23efd562dbd7 SHA-1: 9bcf7d324c7eeccb8d411ce82353f8e4988c38e8 SHA-256: 889caec526437ecf34a724bf1564519e524d3a27ed04e26357a1948dd0db6ba4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a malicious site. The document body, though heavily obfuscated, appears to be a lure related to 'matrices word problems worksheet'. No scripts were extracted, but the presence of an external URI is a strong indicator of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://dafemum.ru/wix?keyword=matrices+word+problems+worksheet
    • https://cdn.sqhk.co/bidekidarub/Lhisnje/6443817432.pdf
    • https://cdn-cms.f-static.net/uploads/4382420/normal_602e4779432af.pdf
    • https://cdn-cms.f-static.net/uploads/4368503/normal_60109fcb3ab55.pdf
    • https://cdn.sqhk.co/gufuluzibos/jiBifib/lyrical_status_lyrics_video_maker_status_video.pdf
    • https://finudumibinad.weebly.com/uploads/1/3/4/3/134344164/bakotaraviruvo.pdf
    • https://static.s123-cdn-static.com/uploads/4373768/normal_5fcc10422a0d2.pdf
    • https://luribexibaw.weebly.com/uploads/1/3/4/7/134750384/ffca3016a393316.pdf
    • https://cdn.sqhk.co/zofukumane/ZDpigji/nvidia_shield_gamestream_supported_games.pdf
    • https://cdn-cms.f-static.net/uploads/4369191/normal_603aa418e47d1.pdf
    • https://fekadoripegat.weebly.com/uploads/1/3/4/5/134592683/1914955.pdf
    • http://semazolowogafoj.22web.org/fejaweruvadajaxusefovija.pdf
    • https://cdn.sqhk.co/xolofiwano/iehijdI/nom_de_la_plante_carnivore_dans_mario.pdf
    • https://cdn.sqhk.co/madagijoj/jgZiiha/super_bomberman_r_switch_characters.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vazisi/bodhai_yeri_budhi_maari_movie.pdf
    • http://kotanefizipabu.rf.gd/loan_broker_website_templates.pdf
    • https://uploads.strikinglycdn.com/files/f03a7557-d01c-4e64-bc4d-8f8423814a8d/bopuwef.pdf
    • https://uploads.strikinglycdn.com/files/7b468c89-4c94-41f2-a24a-3661f2001f56/jakewonifiwado.pdf
    • https://s3.amazonaws.com/dorobukasawituw/28913651845.pdf
    • https://uploads.strikinglycdn.com/files/d983bfac-bbe4-481f-b58b-2c35bec48ad3/how_to_set_up_roku_on_magnavox_tv.pdf
    • https://s3.amazonaws.com/lanaladu/berizimodeka.pdf
    • https://s3.amazonaws.com/muwomapotumugi/regororarutorinave.pdf
    • https://uploads.strikinglycdn.com/files/68780d8a-1f60-4475-aac0-979eef859347/57169786788.pdf
    • https://s3.amazonaws.com/bopuxosavubare/wujakef.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_off00016e74.bin
a252f126634ebe61a094b12b191b1f2a38b875edcd9abb126c8da0d707c6f49c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E74 5616 bytes
font_01_sfnt_off00018171.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18171 1800 bytes
font_02_sfnt_off000189ff.bin
eaa5235a8c51fadac09335c7a08507fee6af03066da45c0759b088d9a2ea86d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x189FF 12676 bytes
font_03_sfnt_off0001b558.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B558 16164 bytes

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