Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc14e802d242444…

MALICIOUS

PDF

78.6 KB Created: 2021-04-23 19:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1a49d57221fac822710209eecbb913b6 SHA-1: 1a1afe8a7f5022b652a7ffaa4c85f1d81433349a SHA-256: fcc14e802d242444aebb5376324489d3cced9aebf9ef0bcbd550c448bf29cffe
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 0.9997

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://maypoin.ru/strik?utm_term=how+to+treat+cystic+acne+fast+naturally PDF link annotation
    • http://item-get.top/vimuvixanek072k.pdfIn PDF document text
    • http://summ-ita.space/93599709817axklu.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/jjObGge/67791520520.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedepobe/gjNfzhf/cheat_sheet_scrabble_words.pdfIn PDF document text
    • http://casser.xyz/program_management_vs_project_managementny7q3.pdfIn PDF document text
    • http://stepka2016.xyz/tabigejinau6v4d.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuxilav/jhjbXhd/drive_for_speed_simulator_apk_mod_download.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/stick_shadow_fighter_mod_apk_2020h358y.pdfIn PDF document text
    • https://cdn.sqhk.co/bokapapukopa/hemIKld/panic_alarm_system_in_car.pdfIn PDF document text
    • http://interplast.ru/poule_rousse_pre_castor_activits_maternelle8jfww.pdfIn PDF document text
    • http://brandframeb.com/lujobusutulifewitogarx1ze.pdfIn PDF document text
    • http://helpcreditscore.info/rick_and_morty_pocket_mortys_mod_apko0uh9.pdfIn PDF document text
    • http://fitnesspack.net/joriwazabukowivege1tss.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/XwRgjzV/5051208556.pdfIn PDF document text
    • http://epaytds.xyz/honda_pilot_owners_manual_2012jp60q.pdfIn PDF document text
    • http://discount50it.pro/simple_electronic_projects_for_students_with_circuit_diagramoedps.pdfIn PDF document text
    • http://lollipopa.online/what_is_the_best_project_management_approachdf16y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/ultimo_aggiornamento_instagram.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/how_far_is_it_around_lake_calhoun_and_lake_harriet.pdfIn PDF document text
    • http://lanurifif.rf.gd/batefizetolulagavosuf.pdfIn PDF document text
    • http://zufagubiles.epizy.com/lulem.pdfIn PDF document text
    • http://wekiwuja.rf.gd/case_580n_backhoe_parts_manual.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_off0000f5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5ED 5032 bytes
SHA-256: c8ae52af96322c163f8f62d8c0cba2c932f7d6ed72d2cfc60587450d623cba08
font_01_sfnt_off00010730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 10800 bytes
SHA-256: 6ee632967ff30e1aac7e20058644a0c5f17b639351f92487ec77523fb2b74b89

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