Malicious PDF — malware analysis report

Static analysis result for SHA-256 a305b67cf5c9cbca…

MALICIOUS

PDF

114.6 KB Created: 2021-04-26 14:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 22911b01cbe9b7bc184edde165e64dd9 SHA-1: e9f57953c4d41ae07f362e62883f0b3b53536378 SHA-256: a305b67cf5c9cbca01587280adb2be5b8c968f743fd9e3d5d443db3f077c50ea
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 0.9996

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://dafemum.ru/strik?utm_term=confucius+analects+gutenberg PDF link annotation
    • http://xapowuxif.mywebcommunity.org/aldosteronismo_secundario.pdfIn PDF document text
    • http://cardio-active.site/windows_10_free_upgrade_to_probtfqu.pdfIn PDF document text
    • http://daimontimur.org/diredaroponenupc99y4.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/e5iaibc/dish_anywhere_app_for_android_tv.pdfIn PDF document text
    • http://sikazigazes.mypressonline.com/dasarekenawazixo.pdfIn PDF document text
    • http://kelimap.mywebcommunity.org/attestation_employeur_cesu_vierge.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/hfhhugh/47458743593.pdfIn PDF document text
    • http://saleproducts.pro/free_printable_yoga_pose_flashcardsabjbs.pdfIn PDF document text
    • http://strita.space/environment_friendly_powerpoint_templatesexaxu.pdfIn PDF document text
    • http://obuv-kozha.ru/autocad_3d_human_figures_free_downloadykwig.pdfIn PDF document text
    • http://islta.fun/the_critique_of_political_economyi9wvz.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/5653372615.pdfIn PDF document text
    • https://cdn.sqhk.co/medipevagopu/CYhcJih/nizagivojovipet.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/38488668036ju4t0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bb258e5c-17ca-4f02-8d59-33d10c16c958/calculus_limits_examples_problems.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_abe9a952944d437291c00c7081608685.pdf?index=trueIn PDF document text
    • http://nununad.myartsonline.com/officejet_pro_8600_ink_cartridge_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d09289-acba-4410-a38d-e7874df018e9/43079775546.pdfIn PDF document text
    • https://37dcb74a-b492-4e6c-94d7-6984b04a3d7f.filesusr.com/ugd/01eaca_25574d097f4544b588e9d7727be9e046.pdf?index=trueIn PDF document text
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_c1cf0827286e4a339f8365b20c484c42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4572ec-4d29-4f50-a024-c4b457ba7cfd/xamigoli.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_off000178c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178C9 5092 bytes
SHA-256: 2252f591459d57bd33f730d215dd430cd823cbe9841e0f4a7e52ff01f6726a36
font_01_sfnt_off00018a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A2B 10916 bytes
SHA-256: c7aa586ae4237e8d04fd6e8f068d20a6361a7a11e1973b6cf8046d95e0a69db7
font_02_sfnt_off0001af45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF45 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.