Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cba941f430e8d2c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-18 16:37:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4ed19081de17d466ef2244ec586327e SHA-1: d7d98c95d0329af9c2c008537c5f0aaea15315f0 SHA-256: 5cba941f430e8d2c4de119f9f4c1f11f0af2ad04f65d5e5b89410570d00d6094
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious website. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct user-facing lure text is discernible. No scripts were extracted, but the presence of external URIs and the malware classification strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=hamilton+ontario+chess+club
    • http://trokot-tonirovka.online/811991891057gyp7.pdf
    • http://fartook.online/simple_cake_designs_for_birthdayyowvd.pdf
    • http://raicen.com/pc_games_angry_birds_space_freem9qvc.pdf
    • https://niregesop.weebly.com/uploads/1/3/0/7/130776037/bekozesi.pdf
    • http://nosumiva.mywebcommunity.org/one_day_more_les_mis_original_broadway_cast.pdf
    • https://welirupew.weebly.com/uploads/1/3/4/6/134662060/xebuda.pdf
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/4b9826.pdf
    • http://8gusevshop.website/vebilobiladilaneaipaz.pdf
    • http://faxusigeroles.sportsontheweb.net/que_significa_avaro_segun_la_biblia.pdf
    • https://lubafotet.weebly.com/uploads/1/3/1/3/131380208/4437728.pdf
    • http://dagomakiluje.iblogger.org/84780367674.pdf
    • http://hangookoil.ru/sample_request_letter_to_board_of_directorsdd2xq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pujeriv.rf.gd/do_tv_ears_work_with_roku.pdf
    • http://nononulavojiki.myartsonline.com/hamilton_beach_food_steamer_review.pdf
    • http://tipokeviti.atwebpages.com/tobuzaziliza.pdf
    • https://uploads.strikinglycdn.com/files/7e1c04af-3778-4f57-9571-535bcf7e4b17/navy_officer_brag_sheet_template.pdf
    • https://uploads.strikinglycdn.com/files/a70e10f0-3938-4234-ae71-9e4541942bdf/rovuzosorobuzad.pdf
    • https://uploads.strikinglycdn.com/files/44c9d552-d317-4425-81fa-421f5ece9492/jivinis.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_off0000e31f.bin
bf921cbef6caca5f2d2adc7f8b1b9981e9acb223d540485ccbb6b347b71c68bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 5020 bytes
font_01_sfnt_off0000f3ec.bin
f1367b7cae8cccd201dba95be5cedc136f6594d298e2d9888564db6ac7333bbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 11120 bytes
font_02_sfnt_off000119d6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x119D6 4324 bytes