Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ddfdfa07868ad8…

MALICIOUS

PDF

71.8 KB Created: 2021-03-20 12:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5eb9679b645f7feb54d4c51f3124a0e7 SHA-1: b1da6529f906d260aadb0264c2169abbea8334d6 SHA-256: 92ddfdfa07868ad8330af96967e1ba88c532574d6d17c63594c030aa608b0afc
156 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 Weebly-hosted PDFs with numeric slugs, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs and the PDF structure itself are evidence of this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/wix?keyword=tanner+fox+we+do+it+best+roblox+id PDF link annotation
    • https://nazokorebuvawir.weebly.com/uploads/1/3/0/7/130776058/5973217.pdfIn PDF document text
    • http://sedobepotorosi.22web.org/26407683186.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/5546446.pdfIn PDF document text
    • http://usmileofficial.site/shark_navigator_dlx_filter_walmartheyxp.pdfIn PDF document text
    • https://tivirubopif.weebly.com/uploads/1/3/1/4/131406506/subomepefot_sesugifi.pdfIn PDF document text
    • http://pipvip.ru/games_that_can_be_played_on_acer_aspire_e15i22bp.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/qiaejfs/sonic_jump_pro_apk_aptoide.pdfIn PDF document text
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/nubope.pdfIn PDF document text
    • http://lnstagramsupportlives.com/in_spite_of_despitekccev.pdfIn PDF document text
    • https://xukifunizagopo.weebly.com/uploads/1/3/4/0/134013279/xekiwiromi.pdfIn PDF document text
    • https://cdn.sqhk.co/vakujediraw/hhddwLr/10403522525.pdfIn PDF document text
    • https://tuberosaguxe.weebly.com/uploads/1/3/1/4/131437792/4250809.pdfIn PDF document text
    • https://kotuvowomikek.weebly.com/uploads/1/3/4/3/134370123/d2bc384ab008.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/heFYchi/infection_control_procedures_examples.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/10536191645.pdfIn PDF document text
    • http://jirabumibami.epizy.com/incantation_and_dance_chance.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/88855377415.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/leytonstone_high_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/what_oil_does_a_scooter_take.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/yii2_file_link.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE3 5036 bytes
SHA-256: 85931cf3aa344f817f7e92160cfb6fa7afc526fe087559f3192baf5f94654f8d
font_01_sfnt_off0000dc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC48 5148 bytes
SHA-256: bf178544a3fd6da2e3eea3bb00d0984b4115f478ae0795ba7da5cd66b3d80547
font_02_sfnt_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 10524 bytes
SHA-256: bd213a8bba747315c6c9e958e7eb89f710eefe85b7c9a0b23c44450b55e42846

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