Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b440de2d4f0666d…

MALICIOUS

PDF

76.3 KB Created: 2021-03-22 02:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d73e0fa947d1a4a6ef20a311e5003b3 SHA-1: 240a2b52f9badf5d5524edc500dc799c18490232 SHA-256: 3b440de2d4f0666dd5e0fe747bb627716d9912d765f8cf9334f49c359f4569e8
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or SEO spam campaign. It contains a large number of external links, identified as a "PDF_SEO_LINK_FARM", suggesting an attempt to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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-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
  • 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://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://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

Extracted artifacts 2

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
font_01_sfnt_off0000ffdc.bin
5b24fdfc6f7236513e6c36e5b4493c451930fe8a80e76cb9f584d8d87d1329d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDC 10860 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.