Malicious PDF — malware analysis report

Static analysis result for SHA-256 5452461853fdf038…

MALICIOUS

PDF

79.8 KB Created: 2021-05-13 00:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e9f8ec45501d4e4ccfe01e542868e45b SHA-1: d39fe6c68cdd884ae58d35e7fb307dd585e97a62 SHA-256: 5452461853fdf038c8ee4a05606e441fb257ae0985126f2dcad2beae5cab4229
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 0.9998

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 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://soxebez.ru/strik?utm_term=stihl+cordless+weed+trimmer+reviews PDF link annotation
    • https://cdn.sqhk.co/mixaluwekitu/Jgjghca/lanibudaju.pdfIn PDF document text
    • https://cdn.sqhk.co/pekebugus/idU2jjm/computer_embroidery_designs.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/jedjhif/motor_world_car_factory.pdfIn PDF document text
    • https://cdn.sqhk.co/dukasavubu/hjFjcWq/freeze_dryer_for_sale.pdfIn PDF document text
    • http://salestore.pro/yo_amo_los_diagnosticos_facebookw9s1m.pdfIn PDF document text
    • https://cdn.sqhk.co/bagekaketox/eifnDjh/81482529137.pdfIn PDF document text
    • http://hookup682.site/ilo_32hd_tv_manuals3iga.pdfIn PDF document text
    • http://uabiomanix.xyz/jubuvabycie.pdfIn PDF document text
    • http://flathead.us/kumon_answer_key_level_i_mathzzfpn.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/dhajawI/jofelipijumaralonuzutezib.pdfIn PDF document text
    • http://nesobaka9.xyz/kideg08bzt.pdfIn PDF document text
    • https://cdn.sqhk.co/saguregifu/ghz0wZq/soccer_mobile_league_16_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/dKmibV7/guessup_word_party_charades_family_game.pdfIn PDF document text
    • http://jonapesi.22web.org/aiag_ppap_manual_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mutifitiwexo.epizy.com/kelabaw.pdfIn PDF document text
    • http://tepimajasajuk.epizy.com/15847111049.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/bootstrap_responsive_table_template_free.pdfIn PDF document text
    • http://donakod.epizy.com/what_is_a_postcode_in_ireland.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_off0000fa27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA27 5224 bytes
SHA-256: 273ca71fc43d17b4a0cb5fdc56d58d70a8aef6665772ddf9a4cd471ecd7b0b4e
font_01_sfnt_off00010bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDB 11156 bytes
SHA-256: 38e9734e598403733d9c208cad4202b7f93bc1fa36028f8c1980681e1478d5a4

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