Malicious PDF — malware analysis report

Static analysis result for SHA-256 be020119b3ff082c…

MALICIOUS

PDF

77.8 KB Created: 2021-04-19 08:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 76544d22628844737e005d5f9d631148 SHA-1: f1390b794924879d336045f37b509e815cf27d04 SHA-256: be020119b3ff082c594071cc04f6c33e3407bf14521303ba8eefc2dda3c98341
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, 'https://seumenha.ru/strik?utm_term=what+is+t+mobile+cellspot+router', is presented as a search result, likely to trick users into clicking through to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://seumenha.ru/strik?utm_term=what+is+t+mobile+cellspot+router PDF link annotation
    • https://cdn.sqhk.co/duponetix/IgiTwjf/gavusaxabe.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/jgOghgd/setewoboxegep.pdfIn PDF document text
    • https://cdn.sqhk.co/masezupusi/gqNTfij/free_talktime_vodafone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d766e2-91f6-4efd-8f31-3c5fca78dec1/mogojapuvadijibusuvezavo.pdfIn PDF document text
    • https://aa0e52d0-3c12-4d86-bfd3-e3284f950a51.filesusr.com/ugd/eb1974_cd9146971ec04838bd5727f50bb867b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/14169841745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111be57e-dbe7-4530-9810-85865108a7bc/sejegorelonixomoxogej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02898a84-1595-4d6d-ac2b-b87ac2cd485b/how_much_is_a_2009_bmw_750li_worth.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_00072e6c505144d3922564787b69a3cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dec8d31-43f8-4384-87da-270d94a46736/death_note_light_and_misa_kiss_episode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522e388c-52ae-47ef-bc75-8c9a998a4227/snow_white_short_play_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1938ecf8-c955-41d7-8512-2e866a266bd8/new_survival_games_ps4_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9574233-bcd8-4d8a-8f45-a242104aed34/jefinoviwotew.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/xazugexoripemefibureb.pdfIn PDF document text
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_6372632861334ca6996424a96407a3cb.pdf?index=trueIn PDF document text
    • http://kimamewaseziwal.epizy.com/auto_root_tools_apk_latest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1c0132-1413-4c8a-bbd9-7cf7a4ae5f12/how_to_enable_local_network_access_on_iphone.pdfIn PDF document text
    • http://jofiwevamixeta.epizy.com/11157535855.pdfIn PDF document text
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_62eb23356f054678928c1ec828618a17.pdf?index=trueIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_dbccdd93f1dd4d2a8ba0e07dc6e50115.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e4d0e7-52a2-4c50-9d86-466dfc4ef018/kenwood_ddx512_aux_input.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_off0000f1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C4 5324 bytes
SHA-256: 5eeb10a919ea96f7bbb7c0c94a332d2964e10664891266e1d4926f56f5fe6639
font_01_sfnt_off000103bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 11200 bytes
SHA-256: 690e5548da27242d7d25da31c28e655c482d5a13b998e4a319b169b40333a11d