Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4c50a38c673549…

MALICIOUS

PDF

163.2 KB Created: 2021-03-23 21:13:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a1769f414e8421e80f6be69d836f7d7 SHA-1: eb71f50466c40c31df96b41fcb2563c2993229a6 SHA-256: 2f4c50a38c673549bcd60a475347e01ed6da5d0ce4b211d8c479158c32c87284
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'maypoin.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain keywords related to network devices, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=rt-acrh17+vs+rt-ac66u
    • https://cdn-cms.f-static.net/uploads/4495040/normal_6036d5d074e9a.pdf
    • http://english-10.site/bossetti_cassazionejt7xg.pdf
    • http://francobusiness.com/95162053053f2rw4.pdf
    • http://freefire-gifts.com/what_are_electronic_media_give_examples9v18g.pdf
    • http://apparently-home.com/how_long_does_it_take_to_charge_studio_3_beatsr57fc.pdf
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5feb3bd0308e0.pdf
    • https://cdn-cms.f-static.net/uploads/4428342/normal_5fe702dd67b92.pdf
    • https://cdn-cms.f-static.net/uploads/4453103/normal_603497f5cafe8.pdf
    • https://cdn-cms.f-static.net/uploads/4413017/normal_6034490b00ebd.pdf
    • https://cdn-cms.f-static.net/uploads/4475000/normal_5fda5ded4cea8.pdf
    • http://flowerport.store/83953466607eou5x.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://davakemig.epizy.com/fotoravepetonapuzowix.pdf
    • https://s3.amazonaws.com/jaloto/zegikibukurisinafopite.pdf
    • https://s3.amazonaws.com/tawosutosuxi/diccionario_esencial_latino-espaol_vox.pdf
    • https://s3.amazonaws.com/tanikanaw/xelezexogujakaruneri.pdf
    • https://s3.amazonaws.com/libowebujakux/61167482212.pdf
    • https://s3.amazonaws.com/padosumifubobo/42836215232.pdf
    • http://vimeniwofeb.rf.gd/bugizewazurob.pdf
    • https://s3.amazonaws.com/rumezo/stages_of_recovery_gorski.pdf
    • http://dinixebun.epizy.com/motorola_xpr_7550_bluetooth_headset.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f51.bin
40388e789637f7ed10153f550a1b6e26a97161bac26fb2daf8f42cd88100040f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F51 87560 bytes
font_01_sfnt_off00024533.bin
282b276a6204f18e191bf8f87b64bbf54d777751f3e83f9be4c1ea52ceb73ee8
pdf-font-stream PDF embedded font (sfnt) at offset 0x24533 5240 bytes
font_02_sfnt_off00025720.bin
ee8f3c5fbfc5f1b0d1610c69f3bd91f22de4037766c70f27495d271863f44168
pdf-font-stream PDF embedded font (sfnt) at offset 0x25720 11832 bytes