Malicious PDF — malware analysis report

Static analysis result for SHA-256 315deb8f805c9b2a…

MALICIOUS

PDF

73.4 KB Created: 2021-03-30 18:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd46bd03087bf382ebde2f008251f95e SHA-1: e5414c0a60d6c2ca3e0d00415cadd80088f73021 SHA-256: 315deb8f805c9b2ab26cf667680eb4b39d91821aab1b926d176f96b0d124d281
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on suspicious domains and are likely part of a link farm or SEO poisoning scheme. The ClamAV detection and ML classifier also indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest an attempt to redirect users to malicious content, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8247

Heuristics 4

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://botokaw.ru/award?keyword=java+basics+for+interview+pdf
    • https://cdn.sqhk.co/ganuniwiku/8ieFxgg/fovejurigud.pdf
    • https://cdn.sqhk.co/zifibikom/jzVhfjc/bidetedawubi.pdf
    • http://meetchat.space/icivics_anatomy_of_the_constitution_worksheetihyjj.pdf
    • http://renakuw.iblogger.org/pijabixo.pdf
    • https://cdn.sqhk.co/monasomeb/UTLjage/wesusinosinepok.pdf
    • http://dusikazo.mypressonline.com/merikugupeniro.pdf
    • https://cdn.sqhk.co/zarejesorufo/djcizjg/97543647735.pdf
    • https://wulapoledonuker.weebly.com/uploads/1/3/2/6/132695240/7602066.pdf
    • https://cdn.sqhk.co/govonesed/cighgif/10_drop_hitch_ball_mount.pdf
    • http://zinefikitozozeg.sportsontheweb.net/biotechnology_class_12_notes.pdf
    • http://raisinsapp.pro/59812958476kjz2w.pdf
    • https://bixowupe.weebly.com/uploads/1/3/1/4/131409305/gorobafa.pdf
    • http://tiwujatujoput.mygamesonline.org/how_to_calibrate_oven_thermostat.pdf
    • http://lalevuw.mypressonline.com/navufesola.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gugefojekasarul.epizy.com/action_photoshop_cs6_free.pdf
    • https://uploads.strikinglycdn.com/files/954e2ad6-e10a-461e-80b2-c47207506653/refazenikonili.pdf
    • http://laboluvimaniraf.epizy.com/vomarikab.pdf
    • https://uploads.strikinglycdn.com/files/357bd064-3149-48c1-a6fe-339902e0d6ed/how_big_should_a_sample_size_be_in_quantitative_research.pdf
    • http://dubomebivenu.epizy.com/25777129193.pdf
    • http://bokapakubab.epizy.com/94360634669.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001118d.bin
db0c52ca3c8cfd450d5eddfc4a23fc4b4c5a5bcba4b427bf87fe207517662b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1118D 5400 bytes

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