Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d122ef9a092352d…

MALICIOUS

PDF

71.0 KB Created: 2021-03-20 01:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b61db895da7c3a75cbe179a73a314e73 SHA-1: 4e859443868e9353b360ce18997e687c4c21a359 SHA-256: 9d122ef9a092352d734b3bc951d25613ccd37eb71a71cf8ea6da3b29433a2199
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with a primary one pointing to a suspicious domain 'resalured.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, suggests a lure related to a 'spectrometer experiment'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/award?keyword=spectrometer+experiment+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5fca6f4a6db1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377905/normal_5fe24e8dc00db.pdfIn PDF document text
    • http://setixin.iblogger.org/canon_speedlite_430ex_iii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_602f63702384a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_600e0ef9355e1.pdfIn PDF document text
    • https://mifopezuzata.weebly.com/uploads/1/3/4/4/134484464/zulopawawojoxevirib.pdfIn PDF document text
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/wikolatezonuxibereri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366947/normal_5fdfbc29481c0.pdfIn PDF document text
    • https://sedarujewajoto.weebly.com/uploads/1/3/0/9/130968957/77f4add35816.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/hj9n65y/coloring_pixels_8x8_apk.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/kikalivezezes.pdfIn PDF document text
    • http://vepekideku.iblogger.org/90938677167.pdfIn PDF document text
    • https://finaxapiw.weebly.com/uploads/1/3/5/3/135301963/zuwomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_605322bb9e364.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/b4Nhbid/xepabagokuluw.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/rotewo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376600/normal_6006be9192249.pdfIn PDF document text
    • http://fevalugumaj.22web.org/bodas_de_sangre_personajes_principales_y_caracteristicas.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/fa69Fih/limetatedena.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/ihjhGhf/idle_guns_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/nufolibizer/hgGigie/bixudisapumonajulujili.pdfIn PDF document text
    • https://xulakuvoloja.weebly.com/uploads/1/3/0/8/130813987/7259030.pdfIn PDF document text
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/8063821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_6050735b5b0cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 5052 bytes
SHA-256: 692f0f9dacdda699692b04abf4069e168154624831ff984953017ad3a91ec272
font_01_sfnt_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 11848 bytes
SHA-256: d9c65bd7b8ff8b8076e7f78f2035357ac56bf9e6714e35bdbaba289cfd31aee9

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