Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e3399ae4205682…

MALICIOUS

PDF

76.4 KB Created: 2021-03-06 06:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 208d68b4fa7afee0e3d081c315892a92 SHA-1: 2ef6723ce4f5af27244da2f562553f12ac3777c2 SHA-256: e5e3399ae4205682c017ef6701b980a05a5194675b6696d64e358a57e7ace0e1
186 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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/123?utm_term=learning+to+read+by+malcolm+x+pdf PDF link annotation
    • https://cdn.sqhk.co/goxobuve/hqUg46e/86014960335.pdfIn PDF document text
    • https://cdn.sqhk.co/togodawexu/ggihjTi/kebesujogigi.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/iiU1Ijh/33833164124.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/jagiihd/art_of_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/geruvijiwiw/BMDP9gd/naughty_boy_feat_beyonce_runnin_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/aihzyic/just_dance_controller_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/rjeidie/movutinokikebetusimulok.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/jgZ4bzB/halloween_run_2020_almere.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/fijgewE/super_glitch_dash_ios.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/695f57c7-2aa2-4f7b-90ba-a043eaadfa61/52898148907.pdfIn PDF document text
    • http://fararisujis.myartsonline.com/20000_leagues_under_the_sea_chapter_12_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/aye_axemen_gyration.pdfIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_77b61ceae02e4c81a9e09e1acb81ad30.pdf?index=trueIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_1812f1426a8f40cca6146200c81fa81c.pdf?index=trueIn PDF document text
    • http://gafodix.myartsonline.com/21204624261.pdfIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_4163d80284474411978d4b2c98d48441.pdf?index=trueIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_ff5ba2d39677463bb2eea2be62de1ce2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/794445c6-d311-4f63-a077-ec2496a67c02/nonagagumo.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/disc_herniation_mri_report.pdfIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_eaff6f8c00a84757a92e6118c33f4cac.pdf?index=trueIn 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_off0000eef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF8 5548 bytes
SHA-256: 98510eba22b734165fb7daa8056c9a610f1953ed4d40c150f06cc9a30ac4318e
font_01_sfnt_off000101d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 10192 bytes
SHA-256: f5246a334f70931acd32785b7efe883e503a87c5adbfb41a33783a914ae86d0e

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