Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cdf627170c41850…

MALICIOUS

PDF

75.7 KB Created: 2021-02-25 22:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d0a35226e45330bf0ed16017928b0cd6 SHA-1: 5adf1b10f5ce86c82caaf62bad5956fc0fb59347 SHA-256: 5cdf627170c418504b3ec0d1160a98fee7be9253f3a747272a130158dc794d1d
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://druttle.ru/wix?keyword=carrie%2527s+story+pdf PDF link annotation
    • https://cdn.sqhk.co/ribobujir/j8ji4jd/golf_battle_cheats.pdfIn PDF document text
    • https://luluroruzole.weebly.com/uploads/1/3/0/9/130969682/digufojelolepuw_komebu_duvetevizax.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/eRhegnn/ruvodivosejoxoxegewajoliw.pdfIn PDF document text
    • http://idealsit.space/5_love_language_descriptionsmbc6k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417119/normal_601ce13c1618f.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/9rNkiax/battery_operated_outdoor_christmas_lights_with_timer_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447880/normal_602aab6ad5b9a.pdfIn PDF document text
    • https://cdn.sqhk.co/norumuwapa/hfiiJzX/cutest_animals_that_will_kill_you.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471475/normal_5ff9f328d6992.pdfIn PDF document text
    • http://alcozerox.com/mekelarinumizojidogp54.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/ghcfhgL/bafukoduxogabotubirir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465557/normal_5fceb3d3f0eea.pdfIn PDF document text
    • http://herss.space/zemusuxukakuwugifa2hj1q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4A 5044 bytes
SHA-256: 4015cb0e5c726b16b7c073597f938b79d2526ad7c750c34a154a3937f6331ddd
font_01_sfnt_off0000fc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8E 11040 bytes
SHA-256: 70657f2ad8f1c64a39100ee74e3d9622e5588cf22a2bc6b27b280e16d484f465

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