Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a30ed82a1442be…

MALICIOUS

PDF

153.8 KB Created: 2021-04-04 11:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08f64d055269ffdd1b3bcafe5ef23ae1 SHA-1: b958d99b13bf49840831d0435a45263fa7767429 SHA-256: 21a30ed82a1442bef260c9427da7f97afac4e98faeddf6434c0ba2b38461c1a1
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, with a high risk score. It contains an embedded URI pointing to a suspicious domain, suggesting it's designed to redirect users to a potentially harmful website. The document body, though heavily obfuscated, appears to be a lure related to a manual, likely intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=manual+piscicultura+embrapa+pdf
    • https://didegesub.weebly.com/uploads/1/3/2/6/132681352/6dcc24f25fd188f.pdf
    • https://cdn.sqhk.co/mamevugixej/hcVggjj/best_goal_goal_predictions_today.pdf
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/9015242.pdf
    • https://boxuvudadutubip.weebly.com/uploads/1/3/2/6/132695546/0be514de.pdf
    • http://rugozuravonabib.22web.org/great_books_to_read_in_2018.pdf
    • http://xufozelit.iblogger.org/les_actinomycetes.pdf
    • https://vedalamiru.weebly.com/uploads/1/3/0/7/130776143/9728691.pdf
    • https://cdn.sqhk.co/ketixudolu/dGsjQj1/27157636265.pdf
    • https://pejagefetem.weebly.com/uploads/1/3/0/8/130815482/6655337.pdf
    • https://ropugobefele.weebly.com/uploads/1/3/4/4/134445072/zosakileb.pdf
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/rabufu.pdf
    • https://cdn.sqhk.co/pefatipi/PggJjdi/snowman_storytime_for_preschoolers.pdf
    • https://jamibada.weebly.com/uploads/1/3/1/1/131164428/favej_wujadelefi.pdf
    • https://nekazexupogufeg.weebly.com/uploads/1/3/1/4/131454238/cdeca.pdf
    • https://juruditusevowe.weebly.com/uploads/1/3/5/3/135329261/839200.pdf
    • https://cdn.sqhk.co/zirimikuj/icuibhL/54751503364.pdf
    • https://cdn.sqhk.co/jimumakevaji/Ukmijgh/sniper_ghost_warrior_contracts_xbox_one_gameplay.pdf
    • https://sifoginugiji.weebly.com/uploads/1/3/4/5/134588619/xakasile-jarefuzap-getinowebil-gomujowo.pdf
    • https://vomedizi.weebly.com/uploads/1/3/5/3/135312409/duzupa-fudizojitutel-tadunifexana.pdf
    • https://pamukisap.weebly.com/uploads/1/3/4/7/134761215/nuburibumupu_devofatamakasas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zodererezuzuxi/versalift_bucket_truck_repair.pdf
    • https://s3.amazonaws.com/kosipefojaw/c_o_c_game_android.pdf
    • https://s3.amazonaws.com/gurowozenupifi/jeep_grand_cherokee_summit_2014_manual.pdf
    • http://mafatiwi.rf.gd/uc_browser_free_for_pc.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_off00020cbd.bin
fa749dcbd19ee3fa9fb0b8930510c14016edd3364ec470f75adf78af039363df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20CBD 5220 bytes
font_01_sfnt_off00021e53.bin
a51e0f1e05198b9972aa8ad26c5098be45e20248d7d206f2af7b9907270dfb1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21E53 14876 bytes
font_02_sfnt_off0002498e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2498E 4324 bytes

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