Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc75e014b7eb5a0e…

MALICIOUS

PDF

81.5 KB Created: 2021-03-31 10:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0d787270827bbf990646f2ebfa0a83bf SHA-1: 1e3ab04ab2d934e96f88362570bfb19dfd71145d SHA-256: bc75e014b7eb5a0e36f8ae691548915c4d3c130009c11b8e16d478afb6f08414
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 0.9990

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://seumenha.ru/strik?utm_term=dell+optiplex+gx620+all+drivers+free+download PDF link annotation
    • http://bajigesupin.iblogger.org/b_prus_katarynka.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/69000681663.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/20987881234.pdfIn PDF document text
    • http://fegiroxopirez.sportsontheweb.net/jimozomezebisejuwaf.pdfIn PDF document text
    • http://vaxenovutejuzid.sportsontheweb.net/travel_itinerary_sample.pdfIn PDF document text
    • http://mufinofol.scienceontheweb.net/chest_examination.pdfIn PDF document text
    • http://zedateve.mypressonline.com/loi_sur_l_amnagement_durable_du_territoire_forestier.pdfIn PDF document text
    • http://fatunatet.getenjoyment.net/89837247814.pdfIn PDF document text
    • http://mumubezafogok.iblogger.org/47150922061.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/pdf_aquaponics_manual.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://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_0a54e61e880947bcaed425859742e29e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/emulator_8086_software.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/71764438818.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/gixejojobanemibelazoti.pdfIn PDF document text
    • http://gotuwun.epizy.com/physics_books_for_jee_advanced.pdfIn PDF document text
    • http://rabelinowizufe.myartsonline.com/arduino_uno_r3_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/appointing_a_guardian_template.pdfIn PDF document text
    • http://nemenarubaz.atwebpages.com/hong_kong_airport_terminal_1_map.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/collision_theory_of_reaction_rates.pdfIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_0edd0c8d7e34431bb1b50dd57cbf4e75.pdf?index=trueIn PDF document text
    • http://baxewape.myartsonline.com/rational_root_theorem_examples_with_answers.pdfIn PDF document text
    • http://pijutisiguzog.rf.gd/oxidative_stress_in_plants.pdfIn PDF document text
    • http://larovitivejel.atwebpages.com/jeffrey_archer_kane_and_abel.pdfIn PDF document text
    • http://gedanenek.epizy.com/bhagavad_gita_slokas_with_meaning.pdfIn PDF document text
    • http://wovuluvoju.onlinewebshop.net/53917985566.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_off0000efdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDD 5644 bytes
SHA-256: 9a674120be66e5edc9dc4dccf133d6608356cce82785caf62bbcc0ad5331df9d
font_01_sfnt_off00010341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10341 11464 bytes
SHA-256: b41ec5abbd7ff48939cef549388ef318b56754540987c761ba958441f7aff4bb
font_02_sfnt_off00012a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A21 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3