Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bad36b464ec9520…

MALICIOUS

PDF

77.9 KB Created: 2021-03-08 16:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d7ef12d8d17384fdb06e0d4d39d2ecf4 SHA-1: 5e174f72b5f924d574adfea84824ed87783b608c SHA-256: 1bad36b464ec9520545905094676934ba1815e9e4610e9ed6a8227afa3b65bf8
126 Risk Score

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 0.9956

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://botokaw.ru/123?utm_term=cephfs+slow+performance PDF link annotation
    • http://vekvelo.ru/46331419295w0j4g.pdfIn PDF document text
    • http://solokekojo.22web.org/spain_food_guidelines.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/kudobife.pdfIn PDF document text
    • http://smartbright.club/balancing_chemical_equations_worksheet_2p0ipw.pdfIn PDF document text
    • http://sigixexizo.sportsontheweb.net/what_is_the_interior_angle_of_a_4_sided_polygon.pdfIn PDF document text
    • http://maslovauto.ru/how_to_make_a_dice_tower_out_of_a_pringles_canvvffy.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/firmware_tp-link_tl-wr841nd_v7.2e8589.pdfIn PDF document text
    • http://usesucre.pro/is_holding_up_the_universe_a_true_story47cfu.pdfIn PDF document text
    • http://ionatr.fun/593312888248wk3n.pdfIn PDF document text
    • http://vetebozo.mypressonline.com/84299344852.pdfIn PDF document text
    • http://obuv-kozha.ru/32367488689wepc.pdfIn PDF document text
    • http://podcard2020.site/wutuwuxibojojoxexawosichwco.pdfIn PDF document text
    • http://tevuvisena.iblogger.org/18967669470.pdfIn PDF document text
    • http://bubble1.space/ghana_police_admission_formsg5rxo.pdfIn PDF document text
    • http://freds.space/how_to_cook_vegetables_with_pastaav997.pdfIn PDF document text
    • http://biwijenanun.22web.org/xamigitojanugazabulujasi.pdfIn PDF document text
    • http://vedakedudeloko.22web.org/what_places_give_you_free_stuff_on_your_birthday.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/25340700008.pdfIn PDF document text
    • http://limebeb.epizy.com/introduce_yourself_interview_questions_and_answers.pdfIn PDF document text
    • http://kuminatunajovop.epizy.com/mental_health_visual_observations_clinical_practice_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fdc13b3-9119-4621-b1ba-2229a35eea22/how_to_run_a_recording_studio_business.pdfIn PDF document text
    • http://faloboxodutak.epizy.com/woradimekajetebugumorem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5a7288-e0f6-4d9c-8221-90d4f68b6e18/72889888960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa530084-c103-4e9d-aaee-5eeb430eee13/bixesokutujokigirisixagi.pdfIn PDF document text
    • http://magomigubilo.rf.gd/engenius_durafon_pro_industrial_cordless_phone_system.pdfIn PDF document text
    • http://rotalewisiv.epizy.com/gloomhaven_classes_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7bb8fb2-f7c0-4744-84e6-af89ea59c6a0/digijurafawudavogam.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_off0000f1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 5252 bytes
SHA-256: fe423bdc67049a9bb9118261343217757acd4a3df7ee2463f3ca3eb4bbea78e2
font_01_sfnt_off000103a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A1 11204 bytes
SHA-256: 775f077c8a0cc483a845cf228181bdb62bc1fb3b7b4ee1a47f524792231651be