Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc04be629ddbe6e9…

MALICIOUS

PDF

79.1 KB Created: 2021-03-25 18:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e96192d440990d85c8ba6e439cc7db57 SHA-1: 8879236a47f4a2ab46eae70609b4636a64112e44 SHA-256: cc04be629ddbe6e97b5efb6f8bc420b55fdb18883d76e9a42742b087dfab3071
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://leonvi.ru/123?utm_term=bawra+mann+dekhne+chala+song+free PDF link annotation
    • http://sfhgfje5df.xyz/whats_in_a_name_activity_sheetrdl23.pdfIn PDF document text
    • http://itasda.online/kung_fu_tea_holiday_hourslpkdo.pdfIn PDF document text
    • http://2220202.ru/petezoxuxonakasutabusedartswy.pdfIn PDF document text
    • http://paxivevazuf.iblogger.org/what_are_your_best_kahoot_names.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/word_2016_keyboard_shortcuts_not_working.pdfIn PDF document text
    • http://nulatapukedu.scienceontheweb.net/zizozoganavaz.pdfIn PDF document text
    • http://anyita.space/how_to_cancel_adobe_subscription_onlinebms6t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/kimone/72670553298.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/27668946762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea35d59-a862-4c46-a5de-e26092f764ef/jegusaxizibexo.pdfIn PDF document text
    • http://lusuvurulap.epizy.com/sanitojasel.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/shirt_size_guide_next.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/490179cc-f0ca-4460-9e82-03b484c6e666/nekupojavafimogodemep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/007f7120-a075-4146-9b98-351736b664fb/1934596780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6841cd3-2e21-4554-8c2e-65f12989b95b/7356389367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec307c5f-e480-4d62-8071-1169795610af/ladies_dark_blue_denim_jacket_uk.pdfIn PDF document text
    • http://gotobixeg.rf.gd/pdf_file_reader_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f80436-d53a-444f-b20a-a57f139ca6a9/gokek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F9 5640 bytes
SHA-256: 6e6f81c4029b8aa9e4160249b227754c8b7bcbaa4db800f94f12501f21fba8c1
font_01_sfnt_off0000fd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD14 10428 bytes
SHA-256: 5041ae2de9fe1cebc6f7691c2fb395f50536f5592b7190c580fbf4a602ac9486
font_02_sfnt_off0001210f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210F 3212 bytes
SHA-256: 0badf03dec5bb65d2fdcc09f6b81cf34870bf5e5f1ac5ffa90e9ad6c8ebd7a00

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