Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5add12bc5c0c3ee…

MALICIOUS

PDF

79.8 KB Created: 2021-02-28 14:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 620445363db0db50fdbbaa9dabd63d95 SHA-1: ca13f88f19c8e0827758099530ef34e17101d48d SHA-256: e5add12bc5c0c3ee86e952440557fa49522c098a48c53fb6b9fa840aa9c35a41
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of link farms on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=sas+ods+pdf+change+orientation PDF link annotation
    • http://hookup153.online/furofakozifitojosdvyc.pdfIn PDF document text
    • https://kisewosa.weebly.com/uploads/1/3/1/0/131070890/6797026.pdfIn PDF document text
    • http://center-san.ru/bebanejl7uu.pdfIn PDF document text
    • http://discount50it.pro/lp_asidosis_metabolik9igtu.pdfIn PDF document text
    • https://cdn.sqhk.co/bodorosuzuta/jciin9I/52970805781.pdfIn PDF document text
    • http://vuzisebepuda.iblogger.org/dd_nine_hells_campaign.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/jmDgigh/ben_10_omnitrix_mod_for_minecraft_pe.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/ihicUpQ/pixelmon_mod_for_minecraft_download.pdfIn PDF document text
    • http://sdek-24.cc/what_is_it_like_to_be_a_bat_thomas_nagel_summaryh1z4l.pdfIn PDF document text
    • http://topvideo.design/19362242909phvdd.pdfIn PDF document text
    • https://sikenobavusemel.weebly.com/uploads/1/3/2/6/132682861/loluve.pdfIn PDF document text
    • http://detonic-ufficiale.website/henderson_s_dictionary_of_biologykt6k0.pdfIn PDF document text
    • http://nukakerosezopep.22web.org/gta_4_game_android_1._com.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/e8897e994de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://woniwasazox.epizy.com/533564850.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC92 5276 bytes
SHA-256: cf5ade2d4ca37ab9b0cd7eade17b5412832c7c55d537e2b10705969f7bda30e5
font_01_sfnt_off0000de60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 1940 bytes
SHA-256: 414d786b459f0f5d2a731291ef1b870d88176140611ada2eab9f82aaf6e76e23
font_02_sfnt_off0000e796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE796 11216 bytes
SHA-256: dfbe6acde1f9660c4417dc0d6e93db11e0237a01713df2bd53ff7106b3b86748
font_03_sfnt_off00010e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E34 16160 bytes
SHA-256: 9ffc405fbed68b1ed35cf25504b2a045b5802e2074cf99e6920a228075e829fc
font_04_sfnt_off0001233a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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