Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e94cda7d27168a5…

MALICIOUS

PDF

78.3 KB Created: 2021-05-06 22:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c04ef59c328a8823d55b6df54733fcea SHA-1: ec14d5d9e96a5adaa31ee64248dd359558ffcf09 SHA-256: 8e94cda7d27168a509b582c8b74cbaee3c21692ff9ba161f3c5114ec7bf927e8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://crophysi.ru/strik?utm_term=does+the+12+step+program+really+work PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/zuruxejomusurajezena.pdfIn PDF document text
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_7729590b08e244699a277c936c997800.pdf?index=trueIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_dc15ee3cdb7648e280d206bf2b153741.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/telebululalesupabakovusis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a8d91e-86c3-40c3-b0ab-b4ecde5b8f33/kewarodipok.pdfIn PDF document text
    • http://bomepexajusopa.epizy.com/aggregate_report_from_oath.pdfIn PDF document text
    • https://f39f7cea-6337-46de-af4f-699959e6db0a.filesusr.com/ugd/004672_646eb1f6e859498db6018be8f7c161c1.pdf?index=trueIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_2d7c8c8b527a4fc9968d71b9ec7d640b.pdf?index=trueIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_111e1e6fe78d45bcbb5256276c004c61.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/japeviwukafejajarakiti.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_360c4e5b52584baaaedecee11ccd0e7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/zinowux.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_969699be17e548009ccbaeabc74dbfc1.pdf?index=trueIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_a7d41ffad88743e58118dc749fd5fe65.pdf?index=trueIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_40543979c8d34373b883b3c6d6f7e75c.pdf?index=trueIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_659097e283a44cd7a7e265ce6e8ac99f.pdf?index=trueIn PDF document text
    • http://kinapemib.rf.gd/crystal_reports_2008_runtime_sp2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29218dd-6263-49d5-bae1-57f9bfc04d05/39344230239.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/55906218259.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF275 5672 bytes
SHA-256: e3348b7b67ace5b59db965d81440718d51162bd670defee6835549675d9d4697
font_01_sfnt_off000105bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BF 11264 bytes
SHA-256: 9c35fa79b0182f7aa030f9e2f6e65b43a98a4df622c1b22f6930bd92dcc18904

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