Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d86d6783a08de2…

MALICIOUS

PDF

76.0 KB Created: 2021-02-18 00:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 968f6034cfb88454aa82c17c43f8fbc7 SHA-1: d0f041e4058d47b7407b9d1da42546808f5ac618 SHA-256: 97d86d6783a08de2cb8a45d7f6bd812245d24d27759d3a90a4aa65312449bd5e
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 pointing to suspicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers strongly indicate maliciousness, specifically as a phishing trojan. The embedded URLs suggest the document's primary purpose is to redirect users to malicious sites, likely for further exploitation or credential harvesting.

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://jacksth.ru/strik?utm_term=how+to+tie+rope+knots+for+a+swing PDF link annotation
    • http://ipai.online/513841094770h5cb.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/leselos.pdfIn PDF document text
    • https://wudowured.weebly.com/uploads/1/3/0/8/130873715/db895a0.pdfIn PDF document text
    • https://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/samizabilesuxelak.pdfIn PDF document text
    • https://jawuwokobot.weebly.com/uploads/1/3/1/3/131381435/b479e599af0.pdfIn PDF document text
    • http://hookup154.space/number_worksheets_1-10_printable3hogt.pdfIn PDF document text
    • http://rumulive.iblogger.org/pasuzunafasupevuzod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wivunonovef/rojolevusegawozebubujuw.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/43508450703.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/premium_adobe_photoshop_lightroom_cc_app.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/microsoft_powerpoint_infographic_template.pdfIn PDF document text
    • http://moborudazijom.epizy.com/driver_canon_l11121e.pdfIn PDF document text
    • http://najorenowodume.epizy.com/92152066027.pdfIn PDF document text
    • http://nupawibufa.epizy.com/chicken_invaders_3_cheats_codes.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_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 4944 bytes
SHA-256: 52364c332d39f30a7035ef54674981fb5cb1c2c31707a1fa4d80a1686f2f0421
font_01_sfnt_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 10896 bytes
SHA-256: 9566013ad53f2ef2ef0164bda25d9f846c0fee24e1da17cee29a44a99e52b3f9
font_02_sfnt_off00011500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11500 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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