Malicious PDF — malware analysis report

Static analysis result for SHA-256 9703ccec4891bc31…

MALICIOUS

PDF

77.9 KB Created: 2021-03-27 14:21:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1444b8900ce5d777ebb2a8f01caa102e SHA-1: 2333c4562931f3488d7275ad8def3960cbe3bfb0 SHA-256: 9703ccec4891bc310dbf3cecb4a2a6d0c337ce2c8afcbc306d6135868d2cf27b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting it may be used for phishing or to download further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit vulnerabilities or deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/wix?keyword=icassp+2020+acceptance+rate
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/vewepuwa.pdf
    • https://ronenajawewaxiw.weebly.com/uploads/1/3/4/5/134594127/1bd01758e68.pdf
    • https://cdn-cms.f-static.net/uploads/4380675/normal_600fd8850d1d3.pdf
    • https://viserewisesu.weebly.com/uploads/1/3/4/8/134886384/sigitojebawaxa_maximapetanuzi_butasovojibega.pdf
    • https://pogeruriwijo.weebly.com/uploads/1/3/4/3/134340707/dugusarepo.pdf
    • https://static.s123-cdn-static.com/uploads/4467910/normal_60081cddc53ef.pdf
    • https://lemusudavigi.weebly.com/uploads/1/3/5/3/135395292/4071952.pdf
    • http://gabixumupa.22web.org/nabuvetemofalujekuvogiro.pdf
    • https://cdn.sqhk.co/vidikusupegu/Fz5jcib/paxatojog.pdf
    • https://cdn-cms.f-static.net/uploads/4385412/normal_602e1899c14e8.pdf
    • https://cdn-cms.f-static.net/uploads/4472766/normal_60496a6c12ce3.pdf
    • https://cdn-cms.f-static.net/uploads/4416153/normal_600e9a02acc19.pdf
    • https://cdn.sqhk.co/waxobakal/gKhBzbW/hockey_stick_tape_wax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ruxazek.epizy.com/nimolotewatunepi.pdf
    • http://tosodesuvivat.epizy.com/xebofe.pdf
    • http://bemurulorax.rf.gd/meaning_of_organizational_development.pdf
    • http://jumatomesanore.rf.gd/welidikizajutenurokokap.pdf
    • http://xepepofebaxuvib.epizy.com/surah_ar_rahman_ustadz_muzammil.pdf
    • http://xumugipetoje.epizy.com/insanity_flyff_farming_guide_2019.pdf
    • http://lovateju.rf.gd/ata_100_chapters.pdf
    • http://panejolaraluka.rf.gd/4297569684.pdf
    • http://lexepetilak.rf.gd/trig_identities_double_angle_worksheet.pdf
    • http://koxowasone.epizy.com/wuzudofedu.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_off0000f303.bin
d0dfad52c22e37b5e912e059128b180a6d7fb191122871481cbd891f0c578b8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 5104 bytes
font_01_sfnt_off00010471.bin
7927622d54f065c198f02abf78bb0dd10fc8deba107accf57b5f09e209fc8169
pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 11036 bytes