Malicious PDF — malware analysis report

Static analysis result for SHA-256 52aa4531f5b7c1e9…

MALICIOUS

PDF

111.8 KB Created: 2021-03-18 18:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2af6c31d4582826e53e1eb0fbc59fd7c SHA-1: 600172318661fc6a094b8cc73b04b128ca1729d0 SHA-256: 52aa4531f5b7c1e959b0f9f826e1e4d1fdcb900f38beb1775d9dbac58df8b2fb
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly indicates the document's content is designed to trick users into paying fees for a non-existent prize or parcel. The embedded URLs likely lead to further malicious content or phishing sites, supporting the scam objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://soxebez.ru/123?utm_term=biology+notes+form+1%2526+2
    • https://fugesozuxi.weebly.com/uploads/1/3/0/7/130739141/bamonofokozotidetad.pdf
    • https://cdn.sqhk.co/nisisepolo/Hijiiia/nadubesati.pdf
    • https://kerozuvesiduzam.weebly.com/uploads/1/3/4/3/134375161/2fbf9f009d3806.pdf
    • https://vojituletakez.weebly.com/uploads/1/3/0/8/130874409/gidugapedusugi.pdf
    • https://cdn.sqhk.co/verexoleki/jiiiihb/badenefijilijaxizazo.pdf
    • http://jizemekuguzu.22web.org/12018473612.pdf
    • https://static.s123-cdn-static.com/uploads/4480905/normal_5fceada2ade7f.pdf
    • http://dilofab.22web.org/barking_up_the_wrong_tree_summary.pdf
    • http://polypak.site/33929951859dlzlv.pdf
    • http://xtina.online/manubikgd37w.pdf
    • https://cdn-cms.f-static.net/uploads/4446645/normal_601756f17e9e6.pdf
    • https://nuvitofoje.weebly.com/uploads/1/3/4/6/134640236/paperibixosokaje.pdf
    • https://cdn.sqhk.co/feguzuvubut/ja4jb6D/elasticsearch_create_index_with_template.pdf
    • https://cdn.sqhk.co/leperanurosi/zifpQ6h/laraluzarezutoburo.pdf
    • http://mebets.xyz/comptia_a_exam_questions_and_answers_20189p1h8.pdf
    • https://cdn-cms.f-static.net/uploads/4479212/normal_6027d438162bf.pdf
    • http://nivavonuzav.22web.org/92916412509.pdf
    • https://cdn.sqhk.co/luwagoma/ri52gci/car_mechanic_simulator_2018_cheats_steam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wuwabobujasivor/54924509729.pdf
    • https://s3.amazonaws.com/juzowilipi/my_talking_angela_free_apk.pdf
    • https://s3.amazonaws.com/zifozujiwi/charlie_brown_theme_song_trumpet_sheet_music.pdf
    • https://s3.amazonaws.com/jafujasiwetid/queen_bee_terraria_guide.pdf
    • http://jaforafonox.rf.gd/color_street_halloween_guessing_game_answers.pdf
    • https://s3.amazonaws.com/somamere/46497513618.pdf
    • http://mujigivufutufu.rf.gd/bibasezozozizejuxijogutol.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017ab3.bin
3f7ce1580a1d1a06df486d07d770f2ce30735cd8e6fd466e1f7ca2f7f32e323b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17AB3 5080 bytes
font_01_sfnt_off00018c02.bin
ab416d7682032a5878cb093113c70a7948d9d9ee51fc4f1ac64fef3332e0895c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18C02 10916 bytes

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