Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3c0faec441f469…

MALICIOUS

PDF

83.9 KB Created: 2021-03-19 20:20:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d70fdddb0bbd83c6a33cad9208bc9bc2 SHA-1: 7a9fe74eb0a5f67ee944f7916072983c9cb7f230 SHA-256: fb3c0faec441f4694cde4f1a176dd24f0b91a12dcc8473b8cc71030e6ab203b8
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links suggests a link farm or phishing campaign designed to redirect users to potentially harmful websites. ClamAV also detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/123?utm_term=jasper+reports+pdf+password
    • http://gemofesane.medianewsonline.com/daewoo_5_000_btu_manual_window_air_conditioner_dwc-0520fcl.pdf
    • https://nilanifuk.weebly.com/uploads/1/3/5/3/135322299/sevinon-nuvubukiwu.pdf
    • https://cdn.sqhk.co/tosilura/zJQifjg/dirazobavedilotutoraja.pdf
    • https://static.s123-cdn-static.com/uploads/4393345/normal_5fcd3c77e5242.pdf
    • https://cdn-cms.f-static.net/uploads/4383165/normal_6029d3e400cec.pdf
    • https://cdn.sqhk.co/xubupigegi/dXigdJs/field_goal_kicking_games_android.pdf
    • https://cdn-cms.f-static.net/uploads/4375517/normal_6025cfed200ec.pdf
    • https://cdn-cms.f-static.net/uploads/4489583/normal_600e44a19c6ab.pdf
    • https://cdn.sqhk.co/tivinarafuvu/hcqhSu3/clearscore_app_apk.pdf
    • https://cdn.sqhk.co/wepunajexiju/eihifgh/road_trip_essentials_amazon.pdf
    • https://static.s123-cdn-static.com/uploads/4480904/normal_5fefa4b29d33b.pdf
    • https://cdn.sqhk.co/kamozipu/hbZfyEl/wordscapes_level_72_cheat_sheet.pdf
    • https://cdn.sqhk.co/pulovafafita/gjjeDvO/ruforurize.pdf
    • https://cdn-cms.f-static.net/uploads/4489061/normal_604f684926855.pdf
    • https://cdn-cms.f-static.net/uploads/4369327/normal_603615556bb8e.pdf
    • https://cdn.sqhk.co/vefusujix/aAhiChh/zutilagoz.pdf
    • https://cdn-cms.f-static.net/uploads/4405419/normal_603bd9c63436e.pdf
    • https://kunexiravirub.weebly.com/uploads/1/3/5/3/135344507/raduxipez.pdf
    • https://static.s123-cdn-static.com/uploads/4462339/normal_5ffefea324071.pdf
    • https://cdn.sqhk.co/josipinu/t6zjgg7/turbo_drift_y8.pdf
    • https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/6d19dd.pdf
    • http://kalukawuwo.mygamesonline.org/76697714540.pdf
    • https://cdn-cms.f-static.net/uploads/4403817/normal_600ff7eb35e47.pdf
    • https://tudegikugil.weebly.com/uploads/1/3/5/3/135317618/rabojofatur_muxor_kemuziduvig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e723.bin
37a1b4fb328f5c41aea7e8c7feca5a286663c0bdd1dde36cab33b6b7015bb682		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE723 4716 bytes
font_01_sfnt_off0000f74d.bin
12f7d960c821e746c6ca5a5339818151439a216f9e16043ae5bca12a16b0a5e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF74D 11392 bytes
font_02_sfnt_off00011e2a.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2A 16204 bytes
font_03_sfnt_off00013357.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13357 4324 bytes

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