Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6ec4a4b408efec…

MALICIOUS

PDF

72.0 KB Created: 2021-07-03 02:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 203f0ac8deb143c79c7318b2f829367f SHA-1: 1af799ee3c4d299f8fcabbebf0e8bb12458a33ba SHA-256: ed6ec4a4b408efec914dec80d90b8c776ac328c7b5435c49070b58a120ac09eb
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, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'https://archism.ru/square?utm_term=grandma+and+grandpa+painted+a+picture+lyrics', which is likely part of the lure. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of the malicious URL strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://archism.ru/square?utm_term=grandma+and+grandpa+painted+a+picture+lyrics
    • https://cdn-cms.f-static.net/uploads/4470692/normal_60275b1c6ab96.pdf
    • https://cdn-cms.f-static.net/uploads/4466143/normal_5fe8e5dc828d2.pdf
    • https://static.s123-cdn-static.com/uploads/4454184/normal_60078c463a1a9.pdf
    • https://cdn-cms.f-static.net/uploads/4471514/normal_601d0180af674.pdf
    • https://static.s123-cdn-static.com/uploads/4402014/normal_5fdfbb3163aa7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/41ae97ba-36ee-474a-859a-821bddd26f44/final_fantasy_7_remake_reddit_review.pdf
    • https://uploads.strikinglycdn.com/files/932e67fe-1529-494d-bc81-e6de9c95803f/4_pics_1_word_level_2410_answer.pdf
    • https://uploads.strikinglycdn.com/files/4c202beb-2c8a-472b-98c7-9a770f06f981/jigejib.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60d56654a5c643673bb977b2/1624598100920/capitan_os_x.pdf
    • https://static1.squarespace.com/static/60bf6c6a79613f649bb1d090/t/60cac5299f31e359a10c4be8/1623901481689/lil_uzi_vert_lyrics_corvette.pdf
    • https://uploads.strikinglycdn.com/files/7fec76bc-cdfc-43cd-b45a-fa2808624a9b/how_to_use_innova_5300_lat.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60cbf96b6e69b0029188b468/1623980395739/educational_psychology_woolfolk_free_download.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60df94796281923c0a902c45/1625265273816/video_quiz_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/75e61140-8e13-41a0-b00a-8e962644af66/polatavaragiti.pdf
    • https://uploads.strikinglycdn.com/files/bcef7943-8ccb-4e4f-adf6-3240dddc9c73/cannon_gun_safe_electronic_lock_problems.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ce8ab9a9202f72b0ef1c24/1624148666013/50911410544.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60d5470f5e61722d19a4285f/1624590096040/54322958210.pdf
    • https://static1.squarespace.com/static/60bf6c6a79613f649bb1d090/t/60c8b404facd1d0dda04ef3f/1623766020207/disha_bitsat.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ca593991ac5145aba8d218/1623873850075/fezofabarujafazuko.pdf
    • https://uploads.strikinglycdn.com/files/e15ab948-f6ce-4b4a-91d7-6f852d9df594/33342816971.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_off0000dc21.bin
182f68962c9eda7e9aa76d669e0b2d9ea681dcc071059b9044d323f06b08e336		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 5528 bytes
font_01_sfnt_off0000eede.bin
197ffdd3d932ea7f9a91e536e8b9e3179525ea8049d652479b3206878fa577ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDE 10436 bytes

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