Malicious PDF — malware analysis report

Static analysis result for SHA-256 77caca69fde027d4…

MALICIOUS

PDF

111.9 KB Created: 2021-03-30 01:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69d4d7ec2203d1a44829143147ad8363 SHA-1: a20cb35678db9d3ec6bda3b1c24ab109b0e540cf SHA-256: 77caca69fde027d450a2e14971c15d1428f9eacdc35eb2db3467b81782b245ea
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text suggesting a lure related to "Sat reading practice khan academy", directing users to a suspicious URL. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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://pelibifir.ru/strik?utm_term=sat+reading+practice+khan+academy
    • http://taribada.22web.org/wurus.pdf
    • https://cdn.sqhk.co/totuzilexif/chiiejg/19396022246.pdf
    • https://cdn-cms.f-static.net/uploads/4489586/normal_6020087e82c54.pdf
    • https://cdn-cms.f-static.net/uploads/4392661/normal_601713366a108.pdf
    • https://cdn.sqhk.co/jogeguzotire/hfjMgij/electric_trains_for_sale_near_me.pdf
    • https://cdn.sqhk.co/fupokonabat/A2zghIB/esc_guidelines_for_heart_failure.pdf
    • http://jefuxifutubanal.iblogger.org/visiting_card_design_download.pdf
    • https://cdn.sqhk.co/gozigawefo/jhjaKji/traffic_run_cool_math_games.pdf
    • https://cdn-cms.f-static.net/uploads/4401519/normal_60558da272476.pdf
    • http://fuxakuzaporelu.iblogger.org/industrial_psychology_journals.pdf
    • https://cdn-cms.f-static.net/uploads/4456143/normal_601bc0eb9a1f1.pdf
    • http://nelawetazabuta.66ghz.com/6806184723.pdf
    • https://cdn-cms.f-static.net/uploads/4419642/normal_602f36ff49734.pdf
    • http://merogerofame.66ghz.com/41283766846.pdf
    • https://cdn.sqhk.co/vopovaroxamo/ichdhbU/gatifafogegaziwaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nutanigonu/1_day_hormone_reset_diet_review.pdf
    • http://perufukag.epizy.com/luzowevitusos.pdf
    • https://s3.amazonaws.com/mexavofezoxi/ikea_bed_frame_instructions_brimnes.pdf
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_aaf22c07fc8149fbae2b49cc693469f8.pdf?index=true
    • https://s3.amazonaws.com/medaliwifufugel/does_android_auto_use_bluetooth_for_music.pdf
    • http://dodinakek.rf.gd/adda247_ssc_reasoning_book.pdf
    • https://s3.amazonaws.com/gafedupeba/adventures_of_tintin_movie_characters.pdf
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_a26274bf04904c5eb3bdce6f5097312e.pdf?index=true
    • https://s3.amazonaws.com/petubapizo/57355964605.pdf
    • https://b147a2f3-58af-4013-9def-597e86e94513.filesusr.com/ugd/47d6bb_fae2d2380d644290ad82a926bbb4114b.pdf?index=true
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_d6cf9fedaa774564a43cafcae40bf1eb.pdf?index=true
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_ad3dd3afcb8a492cb31a3c435acc4948.pdf?index=true
    • 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_off000122c0.bin
fe41991298c611f1c50f888f5573ea80d72fa7efefb62471592edaf332842fc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122C0 11336 bytes
font_01_sfnt_off00014642.bin
16675ce8dbf0b0a1e166732e0eb38f42b454ea233a6ddab7d789a4910e856946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14642 5548 bytes
font_02_sfnt_off000158ff.bin
adbc39f60d615ddb9452f91a0e51874f142a9dd94553afd1b59def708a34ce4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158FF 23980 bytes
font_03_sfnt_off00019a1b.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19A1B 16204 bytes

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