Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b6a8322391a9b9…

MALICIOUS

PDF

67.9 KB Created: 2021-02-27 22:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fa2721ecfeba95b2b81d935ef12a2a8c SHA-1: b655a8c2dd26abc7465a2986efbac20a097e3052 SHA-256: d5b6a8322391a9b90c09a6513dbc3a2f867aa1751b805b529aa8d172a119bdc3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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/wix?keyword=cphims+review+guide+3rd+edition+pdf PDF link annotation
    • http://sarkife.site/pogepokuzaxotetizegasobutrv8vt.pdfIn PDF document text
    • http://nasporte1.fun/nuages_music_sheetjvgog.pdfIn PDF document text
    • http://small-italy.space/wedapogumejonotifachal.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/EFMihjj/90497428738.pdfIn PDF document text
    • http://viputixezererej.66ghz.com/39316282484.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374517/normal_6006a7a838372.pdfIn PDF document text
    • http://afterdealer.pro/zenevadu626ft.pdfIn PDF document text
    • http://animoney.xyz/atomization_and_spraysr5h2d.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/crimson_pandaren_phoenix_guide70tgv.pdfIn PDF document text
    • http://topsale.pro/65343877234l6bhw.pdfIn PDF document text
    • http://fifamarketbot.com/dutalipujw49mw.pdfIn PDF document text
    • https://cdn.sqhk.co/mimotulifoti/aOhbieO/flight_control_panel_a320.pdfIn PDF document text
    • http://allfreebets.ru/android_10_android_99czbn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_600efa403c7bb.pdfIn PDF document text
    • https://cdn.sqhk.co/vusanutoj/hc4KhgY/buy_real_twitter_followers_paypal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410207/normal_5feb2852e093b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duvasupe.epizy.com/fadujovifuvulefavoves.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_off0000cc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC39 5436 bytes
SHA-256: 9d0f03b7685271b44f8d9858d9780ab1058203b6ffd9ab02da7517eefe9c66b2
font_01_sfnt_off0000dea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA1 10444 bytes
SHA-256: cda21293a9c1614a8d069fec86a24bb659353959568b444b854d3d3011806ebc