Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9a8d4120cabd76…

MALICIOUS

PDF

79.2 KB Created: 2021-05-10 21:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: cb417e9c20319ae0edda1e92ca32608e SHA-1: cdff214e163008e17f185aae049a85588256ba8f SHA-256: ea9a8d4120cabd763bac2aac336f0bd9225864c72e9f92183f428fe0c1bf2f5b
126 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The primary malicious URL, https://baarspo.ru/strik?utm_term=what+does+the+bible+say+about+cheating+in+marriage, suggests a phishing or scam attempt by disguising itself as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=what+does+the+bible+say+about+cheating+in+marriage PDF link annotation
    • http://creditscorehelp.info/warhammer_fantasy_roleplay_2nd_edition_racesi9pry.pdfIn PDF document text
    • http://rabisoluvilava.iblogger.org/tusamu.pdfIn PDF document text
    • http://wirelessinfo.ru/how_often_do_you_have_to_calibrate_a_thermometerl7ti1.pdfIn PDF document text
    • http://medakijizu.22web.org/what_does_the_good_shepherd_do_to_his_flock.pdfIn PDF document text
    • http://newonesitel.22web.org/annamalai_university_dde_prospectus_2019-_20.pdfIn PDF document text
    • http://gikadoketu.iblogger.org/pumera.pdfIn PDF document text
    • http://hesap-al-sat.com/civ_6_gathering_storm_new_civilizationse0c65.pdfIn PDF document text
    • http://tudiweva.22web.org/willy_wonka_and_the_chocolate_factory_cast_now.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_01f0c979e07c4549a45fd8ef14b5737b.pdf?index=trueIn PDF document text
    • http://lazevemu.epizy.com/nisejajidudaluxore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05f918cc-c29f-42c4-b95e-87688af4840a/wefesamutol.pdfIn PDF document text
    • https://9005981c-20a7-4b93-9dfe-a591c0bc6fcf.filesusr.com/ugd/afbba5_b83f20e399dc4380a2326b8baee0055b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe008bb-cbbd-4918-a811-e5d8d251e043/but_how_do_it_know_download.pdfIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_efece0df3a524c798d5e18f8f34d1fd9.pdf?index=trueIn PDF document text
    • http://sojisij.epizy.com/vebaretawakan.pdfIn PDF document text
    • http://junenizexi.epizy.com/free_westinghouse_sewing_machine_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f801cc3-f5b2-4ecf-a0ed-1e0058709d93/how_to_replace_charcoal_filter_in_cuisinart_coffee_maker.pdfIn PDF document text
    • http://labomodofu.epizy.com/concepts_of_database_management_9th_edition_ebook.pdfIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_f1a6d53798ea4b0284a48c0787664823.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/290a6354-e0e5-4fc7-bc70-66f8d7429e63/kindergarten_reading_fluency_passages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/789af8a8-9fe7-4342-9f30-630f96e166e7/how_did_maya_angelou_achieve_her_greatest_goal.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_off0000f6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DE 5608 bytes
SHA-256: 60377c389ad0da5efe52685212b958a20a8e96e9c31092ad93eecc778588fe1b
font_01_sfnt_off000109d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D8 11044 bytes
SHA-256: 140540798887b2514a3a4528ff06f48b7e93561191fbd23a88cc8b32e2ec82cd