Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c29a9816159a853…

MALICIOUS

PDF

102.4 KB Created: 2021-03-23 15:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed3bc50f0ba3f4a362296d697f166ae9 SHA-1: 7417b40f8498bcc9c5749851c0336cc1fd716340 SHA-256: 5c29a9816159a853046fe1e31ebc0ef50dd946eb59f19541b83c046159f4edc6
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational material, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://nipisod.ru/wix?keyword=intermolecular+forces+worksheet+2+answers
    • http://tibudirowe.mygamesonline.org/aussie_slang_quiz.pdf
    • http://aycotoro0.xyz/rigakiravatop0pnj8.pdf
    • http://towufato.mywebcommunity.org/laferavudokanejuborotuj.pdf
    • http://gufutaca5.xyz/how_do_you_program_a_comcast_remote_to_the_cable_box7thdr.pdf
    • http://o-karte-kopilka.com/givujidisesupupezekiguu4lfm.pdf
    • http://rebezun.mygamesonline.org/act_math_practice_test_2020.pdf
    • http://tigafik.mygamesonline.org/98454849376.pdf
    • http://italiahot.fun/forged_in_fire_in_hindi_translation1eezv.pdf
    • http://lodorobirat.22web.org/9072694239.pdf
    • http://formverifiedbadge.com/discounted_cash_flow_excel_sheetv63et.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/65b166e6-d20b-4f3b-a7c4-c88b60345429/vvx_410_polycom.pdf
    • http://nivomoj.rf.gd/519904550.pdf
    • https://uploads.strikinglycdn.com/files/050d0786-4f55-4d0e-94c9-4f0c38bbcbaa/5_love_languages_in_the_workplace_summary.pdf
    • http://fasudum.rf.gd/30668259794.pdf
    • https://uploads.strikinglycdn.com/files/4d97d7b8-0a59-4bb6-9a3f-8f919d011aa8/woligadamavikive.pdf
    • https://uploads.strikinglycdn.com/files/754322e5-4d88-44e7-a923-845ec2de4fa1/dell_optiplex_7010_driver_cab_windows_7.pdf
    • https://uploads.strikinglycdn.com/files/cda15bc0-539f-469a-84c9-48ab0882d8e9/tolenusokepifedetat.pdf
    • http://maxegore.epizy.com/ableton_free_for_windows_vista.pdf
    • https://uploads.strikinglycdn.com/files/4d42aea2-4fa4-4c22-b881-9bb46603f0d3/bomazojurolasuxurupigiso.pdf
    • https://uploads.strikinglycdn.com/files/24f73ee6-8d7c-44bf-9390-2d38870e8f65/danby_kegerator_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/071bdc9a-70c5-4ad9-99dc-6865a6fc2a78/finding_audrey_chapter_summary.pdf
    • http://ruguweronum.rf.gd/96052364375.pdf
    • https://uploads.strikinglycdn.com/files/4437ada2-b654-482a-a275-01c1f25730c4/how_to_count_no_of_words.pdf
    • https://uploads.strikinglycdn.com/files/f33cb8ae-1547-43cf-bb62-8e050ac76e4c/vetofifexubale.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011934.bin
d04e1a9248fdcb1da30a1f6a64202bafde0a0bd88c4f157b6a12ef42ade07eda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11934 6432 bytes
font_01_sfnt_off000128e0.bin
225792cd6a9eaefd5fb2625770095df03b975aeb95cbb8a07ab1efa3be79347b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128E0 3124 bytes
font_02_sfnt_off00013405.bin
1c0b77709671a4e5d7c64f18362fb8ae1b16981f790222958c0fceb474dc4e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13405 5344 bytes
font_03_sfnt_off00014619.bin
66011e8a82a508a76a6b8b43e9b12042d8d2a920e733334420cc9d2bbef14633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14619 12700 bytes
font_04_sfnt_off00017195.bin
0982fa5ca27d38bddae9ef1f44c4540d8c54d95b28df57d006bacb4eaf0bf5d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17195 17212 bytes

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