Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6ea62fd74e97cb…

MALICIOUS

PDF

72.2 KB Created: 2021-04-02 00:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e09be23d348c3e6c5992e1a0df2f8b4 SHA-1: c503b70077a309f869dcc0aec873f9b6dc5e9475 SHA-256: 8d6ea62fd74e97cbad3e10e40d76ce18a629a5d791d143a55d73733aa1508a75
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 point to PDFs, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://midufefew.ru/award?keyword=modern+authentication+with+azure+active+directory+for+web+applications+pdf', is likely a lure to a malicious site. The ClamAV detection and ML classifier also indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9725

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-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
  • 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://midufefew.ru/award?keyword=modern+authentication+with+azure+active+directory+for+web+applications+pdf
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/zogozuj.pdf
    • https://cdn-cms.f-static.net/uploads/4452392/normal_6039c618f12c3.pdf
    • https://cdn-cms.f-static.net/uploads/4405413/normal_604b1d75edfc6.pdf
    • http://lufosopaxukil.getenjoyment.net/xinezibizilimilamobekon.pdf
    • https://cdn-cms.f-static.net/uploads/4402520/normal_60465939ce964.pdf
    • https://cdn-cms.f-static.net/uploads/4459929/normal_5fd7a4780290a.pdf
    • https://cdn-cms.f-static.net/uploads/4371025/normal_604d48d67d9cb.pdf
    • http://judupebe.getenjoyment.net/75447482326.pdf
    • http://jarewitof.mypressonline.com/child_names_in_tamil.pdf
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5fe5513db86ca.pdf
    • https://static.s123-cdn-static.com/uploads/4483070/normal_5fca88a967515.pdf
    • https://static.s123-cdn-static.com/uploads/4464072/normal_5fd09b55dfc4c.pdf
    • https://mivagori.weebly.com/uploads/1/3/5/3/135318233/vovunerarafokinisum.pdf
    • https://cdn-cms.f-static.net/uploads/4446147/normal_600f40262d881.pdf
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5fcefc0b3e79d.pdf
    • https://renejineb.weebly.com/uploads/1/3/5/3/135322717/keloninutapoga.pdf
    • https://cdn-cms.f-static.net/uploads/4459319/normal_604b5566711e6.pdf
    • https://dojapoxozali.weebly.com/uploads/1/3/0/7/130775013/soxazonudakiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizidimawag/vedebemakonubobuf.pdf
    • https://s3.amazonaws.com/xakusineba/keto_diet_plan_veg.pdf
    • https://s3.amazonaws.com/desenaz/pewetevujinorolimonerafu.pdf
    • https://s3.amazonaws.com/sefiwegegagu/calories_in_taco_bell_grilled_cheese_burrito_box.pdf
    • https://s3.amazonaws.com/redegelesibif/mevixuvobagax.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecda.bin
4583b0db3de023f15e0866576e86fa25124e1b21f8f77852d0b51063e6d81848
pdf-font-stream PDF embedded font (sfnt) at offset 0xECDA 5692 bytes
font_01_sfnt_off00010067.bin
555eb0309781a51db6e349905670ca2f3ae53fd1c462f17986f159a0705cb985
pdf-font-stream PDF embedded font (sfnt) at offset 0x10067 11180 bytes