Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a6aa591e5ec48c3…

MALICIOUS

PDF

73.6 KB Created: 2021-04-18 12:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e501f2addf8a78f366e3e072c575fd3 SHA-1: 648f6c4902c741e79d85e9ebca7a85ef45f0cdc1 SHA-256: 6a6aa591e5ec48c3d1378a7f61ede9fa57f080b62b057bb16d6e7de63ea2245f
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF link farm'. The primary external URL points to a site that appears to be part of this link farm, disguised as a guide on writing research papers. While no scripts were directly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to malicious or ad-heavy websites, consistent with phishing or SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9275

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://leonvi.ru/strik?utm_term=how+to+write+objective+in+research+paper
    • https://jowopuvuramikir.weebly.com/uploads/1/3/5/3/135313070/gububusulexamalewuj.pdf
    • http://baditunabupiru.mywebcommunity.org/alman_dili_qrammatikas.pdf
    • https://mepapezivodeno.weebly.com/uploads/1/3/0/9/130969154/e7dd4fb73c7b4e.pdf
    • https://penukigoguni.weebly.com/uploads/1/3/1/6/131606127/5785945.pdf
    • https://jumifusat.weebly.com/uploads/1/3/4/6/134629025/1973937.pdf
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/paxamapab-zozane.pdf
    • https://cdn.sqhk.co/bikawegaj/ieWr4ia/fifa_world_cup_qualifiers_2018_europe.pdf
    • http://jolixasij.sportsontheweb.net/pidujotosulavideka.pdf
    • https://cdn.sqhk.co/bikegola/1zzhhie/turkish_joker_ringtone_download.pdf
    • https://cdn.sqhk.co/zalivelo/bhjOgji/nogeriva.pdf
    • https://pogeruriwijo.weebly.com/uploads/1/3/4/3/134340707/aca9f4165859ab.pdf
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/bogenozaxi-jinisi-sikizowepurut-fudusidozizuvu.pdf
    • https://vopilejuwe.weebly.com/uploads/1/3/1/4/131407469/337d55.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/54e1518b-c147-411f-aa07-2e597daa4db6/officejet_pro_8610_ink_replacement.pdf
    • https://uploads.strikinglycdn.com/files/8908ffd3-fd14-4326-a3e7-1c7d33ff3486/will_breastfeeding_make_my_baby_smarter.pdf
    • https://uploads.strikinglycdn.com/files/f0e03986-7e6f-4501-81f1-f499d38f440c/jeu_de_carte_personnalis_plusieurs_photos.pdf
    • https://uploads.strikinglycdn.com/files/d683612f-4e97-4161-beea-c2d93994cb6d/39493545502.pdf
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_5973b760bc854a9f9231fc867e3b1225.pdf?index=true
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_e7054e1505a14cc5bb504b964bf08285.pdf?index=true
    • https://uploads.strikinglycdn.com/files/de25bce7-2e40-416c-bd44-8e6a7b5aa01c/xofusigi.pdf
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_75d56a9c4798405883c574f671cb500b.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e1.bin
f72b93f77fa284665a416930329b8f2e8b2f3649155607d64bafb6e55381ee00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 5108 bytes
font_01_sfnt_off00010340.bin
91b245285e1abd6e07ff92783c57986f01b76fa93f195f8280bdee72dba9cb68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10340 10676 bytes

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