Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4fef0a1f80f5040…

MALICIOUS

PDF

68.9 KB Created: 2021-03-19 05:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c93c66d6f9808a10d8b505f077e86f5 SHA-1: 7c5681dcf7925646c1f1ce78bfe64ceedd696b65 SHA-256: b4fef0a1f80f50409fecbf005f8a75d99c03e6aaf10c491426f26e6b0ea297de
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with the primary one being `https://maypoin.ru/wix?keyword=ipix+hdr+7710+manual`, suggesting a lure to a phishing site disguised as a product manual. While no scripts were explicitly extracted, the presence of PDF-specific heuristics and the overall structure point towards a malicious document designed to trick users into visiting a compromised URL.

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://maypoin.ru/wix?keyword=ipix+hdr+7710+manual
    • http://smartcoin.design/jekilujenarufunipan9ea5.pdf
    • http://5-euro.info/73925284151xd0xf.pdf
    • http://nesobaka3.xyz/napokelunasosxatp.pdf
    • http://hookup671.site/magutofeduzebudizibetanus9o517.pdf
    • http://bewilotaweje.mywebcommunity.org/bezzera_duo_bedienungsanleitung.pdf
    • http://kifopelidito.mypressonline.com/keurig_k400_plus_water_filter.pdf
    • http://detonic-buy.website/bureau_veritas_logo_vector_freeitp2t.pdf
    • http://didibemez.scienceontheweb.net/livro_tica_na_administrao_pblica.pdf
    • http://mastericy-chistoty.ru/621187574260zgb6.pdf
    • https://cdn.sqhk.co/modonasuje/WNgdijl/20877136167.pdf
    • https://cdn.sqhk.co/nomitusibop/x4Jiijb/pacification_meaning_in_bengali.pdf
    • https://cdn.sqhk.co/vupapevixu/hwhgIxt/vadadimipilu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b1b1ed1d-a631-407f-b8a0-2f609481a9c2.filesusr.com/ugd/3e5895_7a24ac4030ef4d54a9de00b51d0506ed.pdf?index=true
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_3973a687310b485c9b746f438bcad263.pdf?index=true
    • https://s3.amazonaws.com/bojafazes/samsung_wallet_app.pdf
    • https://s3.amazonaws.com/nefagolom/lexique_electrotechnique_anglais_francais.pdf
    • http://nudagimanefej.atwebpages.com/espectrofotometria_de_absorcion_atomica_ventajas_y_desventajas.pdf
    • https://s3.amazonaws.com/vebenok/who_are_the_family_members_of_zeus.pdf
    • https://s3.amazonaws.com/vuliwisuwig/14407184756.pdf
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_5c70d5864a3545e79e29123a3db6a581.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_off0000cf5c.bin
2200982722f8ce668effb5e5e762fbc94f6f72674cfc4c96efc5814d402a288f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5C 5300 bytes
font_01_sfnt_off0000e144.bin
2b22310c04107d625a1bcbf2c7382b22fce23b560dc7cd3f878634678393e66c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 10960 bytes