Malicious PDF — malware analysis report

Static analysis result for SHA-256 821de83cb0a9110d…

MALICIOUS

PDF

80.9 KB Created: 2021-03-19 16:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 98888e8044172b494309a19ccc3952cc SHA-1: 14b67f18a4ef27b8c8f827e2d0fa3ecfe85cf89e SHA-256: 821de83cb0a9110dc2dc979286c1e8d4b8022fe3091caf37e251b1e51d98421e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xezojetit.ru/123?utm_term=galacticos+real+madrid+formacion PDF link annotation
    • https://jikevisanudopud.weebly.com/uploads/1/3/4/0/134017539/8623030.pdfIn PDF document text
    • https://widegavadiwudux.weebly.com/uploads/1/3/5/3/135325068/1327596.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371809/normal_5ffff51c31e1b.pdfIn PDF document text
    • https://bexavulurezil.weebly.com/uploads/1/3/0/7/130738929/rinalodesalidemepiz.pdfIn PDF document text
    • http://mofetopevufije.iblogger.org/antecedentes_historicos_del_alcoholismo_en_mexico.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/titutigoveguromemo.pdfIn PDF document text
    • https://nijeliwawinezim.weebly.com/uploads/1/3/4/4/134497061/704139.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411245/normal_600249140d3f2.pdfIn PDF document text
    • http://wosedumuf.mywebcommunity.org/letter_a_worksheets_for_kindergarten.pdfIn PDF document text
    • https://gurewuba.weebly.com/uploads/1/3/4/8/134892349/3206359.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tusepubenawipad.rf.gd/wojovu.pdfIn PDF document text
    • http://jadufabusen.epizy.com/ovarian_cyst_natural_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/cuanto_pesa_un_metro_cubico_de_arena_mojada.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/vijorasepopuwiwakud.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/9th_circuit_manual_of_model_jury_instructions.pdfIn PDF document text
    • http://tezipibuboxigo.epizy.com/55304964808.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/posi_joists_prices.pdfIn PDF document text
    • http://viniwowosur.onlinewebshop.net/wayne_dalton_garage_door_torsion_spring_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/how_are_vesicles_formed_from_golgi_membranes.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_off0000faf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF8 5200 bytes
SHA-256: fff3cd0e5d53bfd7a11a558a7e2031ce61348479635d15e6f5ad9565661b436b
font_01_sfnt_off00010c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C90 12528 bytes
SHA-256: 130f288227d8568a580de091db964bb7cf8f1fbc80fb7155104c3a81ff4a9d09

Open this report in the interactive analyzer, or submit your own file for analysis.