Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cdc119e01adae2…

MALICIOUS

PDF

80.7 KB Created: 2021-04-12 19:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc589bf1365e51d7ab1e08af2df91f9e SHA-1: 738c950b807b9984b6384cee860ef6c9c2e7b39b SHA-256: e7cdc119e01adae2fe2b84b3b72dc94d539afdeb68811bc3703d150e9ea5d62c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains multiple embedded URLs, one of which, 'https://dafemum.ru/strik?utm_term=anet+a8+manual+pdf', is flagged as a potential phishing lure. The document body, though heavily obfuscated, suggests it is presented as a manual or informational PDF, aligning with a phishing or social engineering attack pattern. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a malicious intent to redirect users to harmful content.

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://dafemum.ru/strik?utm_term=anet+a8+manual+pdf
    • http://lifegirls.site/lasko_cyclone_fan_stopped_workingx7yro.pdf
    • http://rilomenininun.getenjoyment.net/rezokala.pdf
    • http://fitokaps.xyz/are_vtech_cordless_phones_goodw6ucb.pdf
    • http://liwitesuzemumex.sportsontheweb.net/dixodutonenojexeke.pdf
    • https://balebapu.weebly.com/uploads/1/3/5/3/135322653/kurofujete_runafasogeduna.pdf
    • http://wusator.mygamesonline.org/livro_temperamentos_transformados_em.pdf
    • http://vuzetasavuxoso.mygamesonline.org/aiag_fmea_5th.pdf
    • https://lugelobixo.weebly.com/uploads/1/3/6/0/136095506/2469033285df9c2.pdf
    • https://rodugetimevo.weebly.com/uploads/1/3/1/4/131407281/7ed53c1dc4379b.pdf
    • http://bixaxivajujojar.mypressonline.com/lujego.pdf
    • http://nutosuvitiraj.scienceontheweb.net/alendronato_bula.pdf
    • http://mir23.xyz/telemedicine_definition_wikipediaco1d1.pdf
    • http://nuxipawuxodiwa.getenjoyment.net/38274675569.pdf
    • http://olipaka.xyz/toyota_rav4_fuel_mileage_2010k6cnl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_8c7b5ea072d44cc29e3b450bba3e971a.pdf?index=true
    • http://tarepos.onlinewebshop.net/agile_software_requirements_download.pdf
    • http://rodedewezijore.atwebpages.com/83576186042.pdf
    • http://moxixezegosa.onlinewebshop.net/waltzing_matilda_guitar_tab.pdf
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_105253137bf64a19bd80a018331408ae.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f15f.bin
4c688c0676da4c9c3f1d636d29496b85ed1f90b4285ee9b780884cc7de0e34ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF15F 2960 bytes
font_01_sfnt_off0000fbcf.bin
317e3c20102f98e6e2ead83edf78266e22fceb43791fd3f9a41fd36aad13aaac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 5096 bytes
font_02_sfnt_off00010d1b.bin
99e0811dbf58de24ae2047c603940a9ca3e9d6596c05a8b75dcd57681c53ce72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1B 11432 bytes

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