Malicious PDF — malware analysis report

Static analysis result for SHA-256 da30eb04bcd99d5d…

MALICIOUS

PDF

82.3 KB Created: 2021-03-29 17:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 88eeb75296a9b275fac42e09b9111840 SHA-1: 9755ab182032b01d749beea740500351341855f3 SHA-256: da30eb04bcd99d5d63007a46d34ce69075fea4ae255cfe550c8cfa1bf8447599
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 0.9998

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://leonvi.ru/strik?utm_term=is+it+worth+buying+tron+trx PDF link annotation
    • http://wupulij.22web.org/alan_cruse_lexical_semantics.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/OhbSkM3/bird_that_makes_screaming_sound_at_night.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/2WmhjO2/45099181508.pdfIn PDF document text
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/lixaminaboson.pdfIn PDF document text
    • http://navomupalizo.iblogger.org/88496416939.pdfIn PDF document text
    • https://rokumewa.weebly.com/uploads/1/3/4/5/134529377/eda7d01f3e38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_bfa92848fcd7434e89fb0a425b7f8b1c.pdf?index=trueIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_8297fd5cd5344f2e998adfb6ddad75bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/blender_animation_tutorials.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/98430931498.pdfIn PDF document text
    • http://kojevarokor.rf.gd/carboxymethylcellulose_sodium_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/bejeruwi.pdfIn PDF document text
    • https://e8802323-0824-40c5-8a58-19d700e27586.filesusr.com/ugd/50cafd_2f953c0ad05c4a709ecf471552605de7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wixanarer/hand_exercises_for_rheumatoid_arthritis.pdfIn PDF document text
    • https://ad060920-74d0-4a59-a46a-f478898ed72a.filesusr.com/ugd/a7c1e6_6eb16a46b96446c4aa38cb7800b89a9a.pdf?index=trueIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_7a18451ea74d4b81a9330d0b3f2303f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/buwifozeterenamekaledi.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_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 5044 bytes
SHA-256: aff4d59476335257d57a71205d57c3a7d45ac8ef3799607c07dc959325708e49
font_01_sfnt_off000113f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F9 11968 bytes
SHA-256: 8a70f07c59d3787de0d8f3cff697494890dfc2f797c71097aa4d5a1cbbe2ef7f

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