Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd2eb52ab1af116…

MALICIOUS

PDF

89.8 KB Created: 2021-03-23 02:23:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 214c219e29172ed5d16750c85f9e9a25 SHA-1: 10c74351aa30767a1a677d6b532340e812cee84b SHA-256: 1cd2eb52ab1af116da53564dd539f30235319a1b5782479fd1683dc7c199a747
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 'resalured.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to academic notes, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/award?keyword=bcs+theory+notes+pdf
    • http://xogezile.66ghz.com/winrar_5_full_crack_64bit.pdf
    • https://cdn.sqhk.co/tejilunuf/SzDhgja/michigan_governor_election_2020_candidates.pdf
    • http://fafasun.iblogger.org/21828988465.pdf
    • https://cdn.sqhk.co/vujaderaz/jghjdjh/wojna_polsko_bolszewicka_przyczyny_i_skutki.pdf
    • https://cdn.sqhk.co/xajamenujo/njjxAG8/sam_kraemer_koaa_twitter.pdf
    • https://cdn.sqhk.co/pefatipi/Sviggd2/mitumox.pdf
    • https://cdn.sqhk.co/bubiwalifeda/jegeJhc/pomp_and_splendor_meaning_in_urdu.pdf
    • https://cdn.sqhk.co/wuluzajiroz/giDjgLZ/fevogefuvamugonet.pdf
    • https://cdn.sqhk.co/vopunokapire/clighfv/stick_hero_archer_fighting.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zatasipezeg/29442598393.pdf
    • https://s3.amazonaws.com/muvarelo/belajar_coding_lewat_android.pdf
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_a8a0d96fc65f4ff0a646dcedabd2a1c4.pdf?index=true
    • http://jexaziled.rf.gd/sex_education_in_school_essay_writing.pdf
    • http://duliwijedij.rf.gd/supirunuluzejakusip.pdf
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_69cae377cb3b4467a9d1689e32e8f81c.pdf?index=true
    • http://kovewerabarev.rf.gd/carcinogenicity_studies.pdf
    • https://s3.amazonaws.com/dinisemowoge/texaka.pdf
    • https://s3.amazonaws.com/susonanezaj/grave_encounter_movie.pdf
    • https://s3.amazonaws.com/pukaridimupo/suvevogetuwewatodidejilob.pdf
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_313b719d301c452eb3b7f3a5a9e1345e.pdf?index=true
    • https://s3.amazonaws.com/lejivugeleguwod/22445365180.pdf
    • https://s3.amazonaws.com/xufujofaleki/wadilejujogabuzab.pdf
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_6a93725c6c4a473eb3324df4809aeba5.pdf?index=true
    • 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_off00011f7a.bin
26decbd9ca9a23557e841f5ca45a2d47c9bfad4d69fe16fc77b35963632fcbfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7A 5152 bytes
font_01_sfnt_off0001310d.bin
1ce6b396cc7f28c27ae366b0eafed58341d4e910c2d2d99589def4d26d256e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1310D 12076 bytes

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