Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0a39935be0ec44…

MALICIOUS

PDF

72.2 KB Created: 2021-03-29 11:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6be3315fe87c7a463f96659d0447bdd7 SHA-1: 7ad3dda236662cc260469f0d8b61e45f100941c0 SHA-256: 4a0a39935be0ec44ff0ce127a3c6d681da68e0674066eb9d4203034f1dfe2adc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a URL that appears to be a lure for downloading a file, likely a malicious payload. The presence of multiple unknown URLs further supports the phishing and malware delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=vce+to+pdf+download
    • http://funuretebinuzos.iblogger.org/what_is_the_best_lightweight_upright_vacuum.pdf
    • http://prizinsta365.online/certificat_de_vente_vehicule_remplissablenp4o3.pdf
    • http://zupaxowo.22web.org/3d_photo_android_app.pdf
    • http://selizixid.iblogger.org/45409717959.pdf
    • http://flowerport.market/which_is_an_example_of_a_narrative_poem_answers.comz1w30.pdf
    • http://pugisapi.mypressonline.com/calculus_for_life_sciences_wiley_solutions.pdf
    • http://xabidakidu.iblogger.org/kexuluvij.pdf
    • http://kifejuja.medianewsonline.com/77161089891.pdf
    • http://ruregere.sportsontheweb.net/75668256901.pdf
    • http://sozimaxetupow.mywebcommunity.org/how_much_does_it_cost_to_bulletproof_a_6.0_ford_diesel.pdf
    • http://sagokorize.22web.org/4769694824.pdf
    • http://leafester.online/samsung_un65hu8550f_manualst8f2.pdf
    • http://vuvigurozinuro.iblogger.org/vozaponanaxomisifib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://minudumira.rf.gd/sokozexividupojo.pdf
    • https://s3.amazonaws.com/sugowubuf/natigovudasenodox.pdf
    • https://s3.amazonaws.com/lolaritemukole/55586535081.pdf
    • https://s3.amazonaws.com/gupojakami/quiz_questions_on_sports_with_answers_2015.pdf
    • https://s3.amazonaws.com/wuxupewu/capability_curve_of_synchronous_generator.pdf
    • http://kebitux.epizy.com/zuvotiwag.pdf
    • http://mozutulobiris.onlinewebshop.net/7993560674.pdf
    • http://gemovimuwopete.atwebpages.com/35659647764.pdf
    • https://s3.amazonaws.com/roware/72160187171.pdf
    • http://novegiw.rf.gd/78459893704.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a3.bin
e5acb671d84335d19282f0f9eeb3c625627b332bd2763bd650c02d76095f7e28
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A3 4672 bytes
font_01_sfnt_off0000e2a4.bin
c85e38d784f4958b2dfd1cb2ddd0eb60be8a1cbe8d81a899fa7b53e77c66fd55
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A4 10128 bytes
font_02_sfnt_off00010560.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x10560 4324 bytes