Malicious PDF — malware analysis report

Static analysis result for SHA-256 db80f7a6b8c203eb…

MALICIOUS

PDF

67.5 KB Created: 2020-11-21 00:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0709dec7aea1eee4917343d78494a5d1 SHA-1: 2b3dedcdd6628fae4fcf8a86386aed6418216fa8 SHA-256: db80f7a6b8c203eb5ebac0b53cd64967c89533098376dd3c0b8b382fb153e45b
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://trafficel.ru/123?utm_term=jumba+lilo+and+stitch+costume PDF link annotation
    • https://kuxilididid.weebly.com/uploads/1/3/4/3/134387830/dumezanefilideliba.pdfIn PDF document text
    • https://totobulamu.weebly.com/uploads/1/3/4/3/134310137/mikekurujobosi_kivagenudavab.pdfIn PDF document text
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/8b051.pdfIn PDF document text
    • https://tamoxukezoge.weebly.com/uploads/1/3/4/5/134585929/1041271.pdfIn PDF document text
    • https://weragekebikibu.weebly.com/uploads/1/3/4/6/134670115/vomepudiju.pdfIn PDF document text
    • https://sevepamazajekul.weebly.com/uploads/1/3/4/7/134745822/de8b59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5be4722-959e-43f1-b178-aa918c4cb9e5/vojofekimorax.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/ragnarok_online_swordsman_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/hay_day_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f1504a7-cbde-4255-a963-947a9f6bf6a6/49988660043.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/kuwipatuwuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/22574274618.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/sir_walter_hungerford_1378.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/fivitaxekovobudevize.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_off0000c905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC905 5212 bytes
SHA-256: dc4a5b2cabb961a86c50b1fc9d0767c7d13151cadfc6dca69025f6bfd9e188dc
font_01_sfnt_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 11428 bytes
SHA-256: b7e1c0e8cac23d6912573c76384630d80631efef8f4f748d31ad1641ceb7a0e1

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