Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e413f5cebde11d…

MALICIOUS

PDF

78.8 KB Created: 2021-04-08 09:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 86d284d8f225d6716d9d737008be3d40 SHA-1: 65aba0d78d2d6690d21b14261f5766d34d3c66ea SHA-256: 10e413f5cebde11d2ef38056a231b39ba62807762d14df0158fcc132ed6a53f2
156 Risk Score

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 0.9997

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://fokemale.ru/wix?keyword=school+counseling+website PDF link annotation
    • http://securityverifiedservices.com/zalinavirikamawepibajobap7prm2.pdfIn PDF document text
    • http://menformula.xyz/selofifevetaminupuwirx.pdfIn PDF document text
    • https://jibokogemi.weebly.com/uploads/1/3/4/7/134767321/mufamu.pdfIn PDF document text
    • https://xakirajurupani.weebly.com/uploads/1/3/2/3/132303083/5777444.pdfIn PDF document text
    • http://zigapajuxijado.mywebcommunity.org/74379393439.pdfIn PDF document text
    • http://vezerfa.xyz/jinitepe9txdh.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/xopapatelinenur.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/banking_awareness_notes_for_bank_po.pdfIn PDF document text
    • https://wekexodaxax.weebly.com/uploads/1/3/4/7/134713384/42c130.pdfIn PDF document text
    • http://normaa-id.com/28458496483dw9cu.pdfIn PDF document text
    • http://converstarget.ru/email_form_htmlxboyu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_67b13f674b394b29bcc718f0aaab22fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/colon_cancer_screening_guidelines_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/43370277576.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/wovudepamususirigub.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/lacrosse_instruction_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/vazibesulonixivoguxala.pdfIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_b287572e7f934fbea9c9914dcca99f04.pdf?index=trueIn PDF document text
    • http://lajovaputap.myartsonline.com/la_reina_de_los_caribes_emilio_salgari.pdfIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_333f7916b7cf41e39eb5656f7be92955.pdf?index=trueIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_2f3cef0b26994385bab4a14653577b27.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/premier_protein_cereal_near_me.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_off0000f8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A2 5088 bytes
SHA-256: e49dd31430123930e4a6cef181abe9731dce7982997a52a57688e5f8d9888318
font_01_sfnt_off00010a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A03 10580 bytes
SHA-256: 6e45fe298d0f935e692279e3c7d6a54fb17bf75c357f5665fa0c0a970dc5b98f

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