Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43c464709a5d59b…

MALICIOUS

PDF

84.1 KB Created: 2021-03-09 17:09:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2228e4be90598a98c70da2eacd130372 SHA-1: 36be3707eed7b63cf6e1bf47be5f8744e90bea36 SHA-256: c43c464709a5d59b337992cb2c8a5f0d5f0a26a2d5effa502f1c5851afec82f2
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One of these links, 'https://xezojetit.ru/strik?utm_term=william+blake+poetry+nature', is directly embedded and suggests a lure to potentially malicious content. The presence of numerous external links indicates an attempt to direct users to external resources, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://xezojetit.ru/strik?utm_term=william+blake+poetry+nature PDF link annotation
    • https://cdn.sqhk.co/fofotixoz/igfhfjj/zudukanekepi.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/Wiegehc/project_management_methodologies_pmi.pdfIn PDF document text
    • https://fogufapepupol.weebly.com/uploads/1/3/1/8/131871477/namadanokikipe_bemim_giguzelup.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/jggeMhb/transfer_news_bbc_man_utd.pdfIn PDF document text
    • https://lupiwofuguneb.weebly.com/uploads/1/3/4/7/134715795/1688986.pdfIn PDF document text
    • https://mutovowi.weebly.com/uploads/1/3/4/8/134862221/2734050.pdfIn PDF document text
    • http://kubosikavudux.mygamesonline.org/tutorial_autocad_electrical_2016_espaol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fuluxewamotate.atwebpages.com/daxukawobitewuj.pdfIn PDF document text
    • http://medazupu.onlinewebshop.net/zemabanaxoridur.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/ashes_of_creation_apocalypse_guide.pdfIn PDF document text
    • http://vifidumefitur.atwebpages.com/ford_mustang_gt350_for_sale_in_las_vegas.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/huawei_p20_lite_android_9_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/towabelutefifodes.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/karivonepawibu.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/59429114176.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/stroke_guideline_2019.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/how_to_use_canon_mg3500_scanner.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 5108 bytes
SHA-256: b9ae7b531376c3cdbac24b77af4ecfda5f27c9cfb95ac1c0211d3adf67107d71
font_01_sfnt_off00010b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B74 6264 bytes
SHA-256: 131a4805b5fbfdc9dd649613e58a8d4d671fd9ada56e94fb0053d66320e02390
font_02_sfnt_off00011bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC9 11936 bytes
SHA-256: 5c31099f61b304db1e93594dd39b1427814f5f0665b5ebed4fb93b9383218708

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