Malicious PDF — malware analysis report

Static analysis result for SHA-256 825d1e386eec3494…

MALICIOUS

PDF

114.4 KB Created: 2021-03-16 09:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44a2232209da2dbf1f9ef0f17f544f18 SHA-1: 57a61b46615f921286f5d494b46289986ca4967b SHA-256: 825d1e386eec3494e7c81ac2ff9d054cdb171c3d58783d15732c7c508a87714e
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with the primary one being https://golowaki.ru/wix?keyword=college+writing+skills+with+readings+10th+edition+answer+key+pdf, which is likely a lure. ClamAV detection and ML classification strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, potentially a phishing page or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/wix?keyword=college+writing+skills+with+readings+10th+edition+answer+key+pdf
    • http://pixuvuxojatob.iblogger.org/71889146208.pdf
    • http://fegovoze.22web.org/bajrangi_bhaijaan_movie_picture.pdf
    • https://wazufepema.weebly.com/uploads/1/3/5/3/135383665/dopajusitevaluv.pdf
    • https://cdn-cms.f-static.net/uploads/4500450/normal_6048ac1075a09.pdf
    • http://pevojatinolotej.22web.org/cosco_high_back_booster_car_seat_pink.pdf
    • https://static.s123-cdn-static.com/uploads/4418175/normal_5ffb178b1959e.pdf
    • https://cdn-cms.f-static.net/uploads/4366000/normal_6040ae204a6a0.pdf
    • https://cdn-cms.f-static.net/uploads/4380522/normal_60464bb084e78.pdf
    • https://wagigezo.weebly.com/uploads/1/3/0/7/130775958/8588052.pdf
    • https://donokodupotev.weebly.com/uploads/1/3/4/3/134317189/pizobofev_narozove_kulapovagete.pdf
    • https://cdn-cms.f-static.net/uploads/4457838/normal_60384e1987d73.pdf
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/rugupanor-xoxinolunur-gedoporagamazuv-goxunodunalo.pdf
    • https://foxaxefaga.weebly.com/uploads/1/3/1/3/131398491/tidekuketedosikag.pdf
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/868709.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jokajovasoxaruf.epizy.com/old_school_classic_songs_70s.pdf
    • http://juxudawalugevop.epizy.com/descendants_2_music_videos.pdf
    • http://mefozovoluneje.rf.gd/8498310451.pdf
    • https://s3.amazonaws.com/gagagakigibapo/ff14_crafting_guide_reddit.pdf
    • https://s3.amazonaws.com/zabejuvijolu/aao_puli_katha_telugu.pdf
    • http://ritarajekaxitev.rf.gd/82151675117.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/template_of_personal_statement_for_cv.pdf
    • http://ponawilusegulos.epizy.com/60863095481.pdf
    • https://s3.amazonaws.com/sizabo/hunger_games_catching_fire_part_2.pdf
    • https://s3.amazonaws.com/firudegix/jurassic_park_video_worksheet_answer_key.pdf
    • http://sezaluri.rf.gd/48180142801.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_off0001740c.bin
7c17fd6e367833ecd3619f30424c36c5d65657d244f8af633c0289f0fc2f3998		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1740C 5568 bytes
font_01_sfnt_off0001871d.bin
484fed05ebe3dbf85a7d9f8d22af4e3ae4de361d58c116f772d3cbe0edb9d45a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1871D 11220 bytes
font_02_sfnt_off0001ad5f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD5F 4324 bytes

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