Malicious PDF — malware analysis report

Static analysis result for SHA-256 171a970616b274e2…

MALICIOUS

PDF

64.0 KB Created: 2021-03-22 02:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baf5abdc893ffee674f85145a5e01bd8 SHA-1: 08787fc8bffb849ea7212638c130c51e3b877f43 SHA-256: 171a970616b274e27abaf6edc05b452ee2f11cd3d9976c45d5e5f8484919adc7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan distribution. While no scripts were explicitly extracted, the PDF structure and extensive linking suggest it's designed to redirect users to potentially harmful sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9565

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://jacksth.ru/award?keyword=banana+bread+recipes+pdf
    • https://cdn-cms.f-static.net/uploads/4390995/normal_600b54f3814e2.pdf
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/892916.pdf
    • https://levalezekavazif.weebly.com/uploads/1/3/4/6/134639406/bikedubap_repibuge_merozujomukisew_vafof.pdf
    • https://doxugibako.weebly.com/uploads/1/3/0/7/130776338/didudivonawux_gasoravofopedin_fugazewitidumop_fabuvi.pdf
    • https://mobinefoju.weebly.com/uploads/1/3/1/3/131398425/919019.pdf
    • https://gopopozemilin.weebly.com/uploads/1/3/0/8/130874381/0a8af.pdf
    • https://cdn-cms.f-static.net/uploads/4376372/normal_60140db5ee7bc.pdf
    • https://piwaxiru.weebly.com/uploads/1/3/4/8/134882920/56a4142a0c375.pdf
    • https://lukuxafibufogi.weebly.com/uploads/1/3/5/4/135400428/jaganodafa_zudixilojenewob_dofapop.pdf
    • https://mojapilujo.weebly.com/uploads/1/3/0/9/130969316/70742fccf408d7.pdf
    • http://formblckr1.xyz/73025184130ia4jt.pdf
    • http://clipshd.design/how_do_i_setup_arc_on_my_yamaha_receiveria042.pdf
    • https://cdn-cms.f-static.net/uploads/4488336/normal_5fd10660d2cc7.pdf
    • https://wowiwega.weebly.com/uploads/1/3/1/4/131453904/gadupiz.pdf
    • https://cdn-cms.f-static.net/uploads/4500887/normal_5fe64ce9e63f9.pdf
    • http://yewes.fun/35933504008cnkxn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_2616faaa10e34704af7a3695945385c5.pdf?index=true
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_46892f2ba1df430cbbe403f31db074c0.pdf?index=true
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_ae532c63c4414a7caec4680d7e897818.pdf?index=true
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_d9b45ff0a3774528be173761da93a5c9.pdf?index=true
    • https://288dffde-0386-48bd-adba-b069b5f3b70f.filesusr.com/ugd/7e1b39_49c9f5a7e1774a129b2e818ff5ab7734.pdf?index=true
    • https://9ffa65b4-b95e-481c-977d-2cf6acaa57d7.filesusr.com/ugd/f68d46_1a1e257328004dc089f524a1bcc05293.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc7.bin
cc0509b2661da3242dfe9e0d16e036788c2e8b2717767ad4861d74dd0028c039
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 5308 bytes