Malicious PDF — malware analysis report

Static analysis result for SHA-256 386b2510ba7d93f6…

MALICIOUS

PDF

79.6 KB Created: 2021-03-15 23:51:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9291579dd0d51b70a89356a61d22e12c SHA-1: b901976c83b3956f380d1413738049c5c808462a SHA-256: 386b2510ba7d93f677033034c2a7c33019c9c00c81f4d6b36362138ae272cae0
186 Risk Score

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 0.9993

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://jacksth.ru/wix?keyword=dr+mrs+vandertramp+house PDF link annotation
    • https://vobulesije.weebly.com/uploads/1/3/1/8/131857334/3557600.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/anxiety_relief_techniques.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/canon_mg3520_wireless_setup_iphone.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/black_hole_formation.pdfIn PDF document text
    • https://mixuvuweti.weebly.com/uploads/1/3/1/4/131483588/sawilofola.pdfIn PDF document text
    • http://triple-doska3.club/9_ideas_clave._el_aprendizaje_cooperativoj7akd.pdfIn PDF document text
    • http://nout-prokat.website/laraz9p9rv.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/54669159223.pdfIn PDF document text
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/4019926.pdfIn PDF document text
    • http://yandex-delivery.cc/figifabudeporipuv0zoe.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/the_sparrow_book_ending.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/ximepipunazabomaki.pdfIn PDF document text
    • http://goshop32.site/41894936wwme2.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/business_information_system_free_download.pdfIn PDF document text
    • http://retys.space/outlander_books_and_tv_seriesx58h3.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/4171dc5a84.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/mini_golf_challenge_showxt0cb.pdfIn PDF document text
    • http://presente-top.store/147633116182b72.pdfIn PDF document text
    • http://islta.fun/qdialog_close_event_examplegfyhq.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/what_is_civil_religion_in_sociology.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d920bd67-dfaf-4c99-85b0-fcb8118dfb91.filesusr.com/ugd/383849_d52ac3d728f44223b4ef435a812e7834.pdf?index=trueIn PDF document text
    • http://bitenozof.atwebpages.com/kedaxazepajajesogidiw.pdfIn PDF document text
    • https://95a83a18-022f-4aa5-9dc2-588eac4c5c4a.filesusr.com/ugd/ccb6ab_b56db0f65f4142c8ba00132dcdc3ec64.pdf?index=trueIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_d75a1b71abf04421b7cc03891efcb59e.pdf?index=trueIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_c90d6194d9b94f9a9905cf40516e57ef.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_off0000f6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A7 5228 bytes
SHA-256: 315158a73a3b4a41edc9defadbade092d5f24720ea53951e27ec6bed852cb5df
font_01_sfnt_off0001084c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084C 11756 bytes
SHA-256: da7698ad758845f65aa4d9feb74398922d25e884464dacdbdb965558098c36f2