Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb432d5d404cdcb…

MALICIOUS

PDF

79.2 KB Created: 2021-05-17 20:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94b792d06422b1c18aac86aa82991e81 SHA-1: 9fd14ad94ec4495fb419f27ca540607ffae06b81 SHA-256: 9cb432d5d404cdcbcc3c2e5eadd0878d70e9090e34bd67a19c8412c7d0bbba39
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://zajinet.ru/strik?utm_term=master+data+management+software+free', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'master data management software free', suggesting a lure for users seeking such software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/strik?utm_term=master+data+management+software+free
    • https://puroporutenes.weebly.com/uploads/1/3/1/6/131606954/kupukezikug.pdf
    • https://cdn-cms.f-static.net/uploads/4461511/normal_5fe7e87c86ac2.pdf
    • http://bejagofeteveba.22web.org/7_days_till_my_birthday.pdf
    • http://senigudalow.iblogger.org/what_can_u_use_instead_of_apple_pencil.pdf
    • https://cdn-cms.f-static.net/uploads/4464851/normal_606411afda84c.pdf
    • http://liruroz.iblogger.org/calendario_escolar_2020_a_2020_sep_200_dias.pdf
    • https://cdn-cms.f-static.net/uploads/4404966/normal_603eb2165a36e.pdf
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/dukafunexiw-davelunuge.pdf
    • https://cdn-cms.f-static.net/uploads/4393028/normal_605d787c131ff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gebukil/love_cartoon_hd_wallpapers_free.pdf
    • http://xewaditina.epizy.com/forbidden_psychology_101_download.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/bloody_roar_4_pc_game_exe.pdf
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_62cbb93abf4a44e998f81c43ed4f2662.pdf?index=true
    • http://zifasodokid.epizy.com/periodontal_disease_and_smoking.pdf
    • http://zazuxevepiz.rf.gd/50199270644.pdf
    • https://s3.amazonaws.com/jaxesabi/ammadi_ammadi_song_lyrics.pdf
    • https://s3.amazonaws.com/rurosaveruk/pevajedozowupusere.pdf
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_c33667ff92ba406f9c29dc466a2400c8.pdf?index=true
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_88892cc677e24075a0ed6c18deb36267.pdf?index=true
    • http://wekidezeze.epizy.com/86913723126.pdf
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_53aeaac95f1141febefa337c5fa0bf81.pdf?index=true
    • https://s3.amazonaws.com/nazekisigiduz/movumogusujuzipaj.pdf
    • http://zozoresupiz.epizy.com/zosuwozupemim.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_off0000f642.bin
f3a174146ecd7c0aee7e19354ae07202e6770e4423d149990022d8a23c9de727		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 5292 bytes
font_01_sfnt_off00010849.bin
010aa414fdaa2e8ecdedc14b6573509b470495919a2d1471e71645e30f6148bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10849 10976 bytes

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