Malicious PDF — malware analysis report

Static analysis result for SHA-256 d206bee91e6cc664…

MALICIOUS

PDF

75.5 KB Created: 2021-03-21 20:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8448a0976222e8df9a57995eacbbda04 SHA-1: a6016386927aed8832a508695d2e491a09dd0a1e SHA-256: d206bee91e6cc6644899c375525f85a5218a5d0c84d16f5359a172cd4da969b6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded URLs are likely used to redirect users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://maypoin.ru/strik?utm_term=how+to+do+a+moca+exam PDF link annotation
    • http://lizoguxumugef.mywebcommunity.org/girl_boss_baby_party_decorations.pdfIn PDF document text
    • http://vopezikililurab.mygamesonline.org/47229378246.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/dakapuxoporomaja.pdfIn PDF document text
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/rufuwuduxa-kamabo.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/6c8a2cc5399d11.pdfIn PDF document text
    • https://jironomazubem.weebly.com/uploads/1/3/5/3/135393756/5136780.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/dell_b1160_printer_cartridge.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/what_is_the_theme_of_the_book_24_hours_in_nowhere.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vipuzala.myartsonline.com/zuzevisumazorixote.pdfIn PDF document text
    • http://rabelinowizufe.myartsonline.com/what_means_deal_flow.pdfIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_4d0568dcd0d840b48977fe401298bf17.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6065392-134c-43f9-a50a-98fc0160d749/bezeximodukufetolabik.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_ab1b5edc493545d9b57216368efdd9ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0adba761-2b7a-4eff-8196-24477a46f1af/schlage_keypad_lock_not_engaging.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_c458db5afdd14122aeb761d49eed3c62.pdf?index=trueIn PDF document text
    • http://fuluxewamotate.atwebpages.com/nixopulaxapibojofalafel.pdfIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_eac66e2a42624a3e8c40c13c1f1958de.pdf?index=trueIn PDF document text
    • http://kimawawasero.onlinewebshop.net/baixar_scribd.pdfIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_e66e02708e314f43a8f8e6a4b0f39f7c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aaad74f-2843-4635-8ab8-256d7ee4b929/how_to_change_ink_cartridge_canon_pixma_mg3520.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/pedestal_bearing.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_off0000e8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C6 4900 bytes
SHA-256: 29d4e93d976fd14d9e05c5345c3284aafe6b0839111fe95b191f02ace1ad7edc
font_01_sfnt_off0000f976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF976 12028 bytes
SHA-256: 99273da5f908b987fd5879558fc79925e463f4639b58a3825346e7f447789f8c