Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b927dcf257a865…

MALICIOUS

PDF

77.3 KB Created: 2021-03-09 11:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7aaaf415edc965b8b54ca76e250c9107 SHA-1: e9700a190689a9fb398b987bab7f04e9698077b4 SHA-256: 17b927dcf257a865b9dbb69d687443ca40c732a8b1e8b8c8b689e3e82b17e432
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may also be used to trick users into downloading password-protected archives, a common tactic to bypass security gateways.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=bauble+box+template PDF link annotation
    • http://rofuxipof.mywebcommunity.org/are_deep_learning_and_neural_networks_the_same.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/the_crucible_act_1_characterization_chart.pdfIn PDF document text
    • http://khanapoorti.com/kutukipaj3hxs4.pdfIn PDF document text
    • https://cdn.sqhk.co/sarimotel/icaieia/monster_world_fire_full_version_apk_free.pdfIn PDF document text
    • https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/57ab50f2490.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/will_a_cortisone_shot_help_a_meniscus_tear.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/1mUgeid/pencil_boxes_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/femelofep/LIjihcd/.pdfIn PDF document text
    • https://cdn.sqhk.co/virapazetif/Bjjhd7y/vector_21b_manual.pdfIn PDF document text
    • http://kieverts.xyz/109548666017rm1f.pdfIn PDF document text
    • http://tcerkovniekupola.space/711650503900snvi.pdfIn PDF document text
    • http://nafigunagofadab.getenjoyment.net/why_isnt_my_electric_furnace_working.pdfIn PDF document text
    • https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/1187927.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/jdwiTid/star_girl_fashion_makeup_dress_up_games.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/dqLeA0R/premium_midsole_paint_pen_white.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxeje/agcgfN2/84010746106.pdfIn PDF document text
    • https://kifoguwo.weebly.com/uploads/1/3/1/3/131383532/pajakezilo-dawewenuxoxod-lupamuwuzejax-sevinob.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/jfz3fQA/65454823373.pdfIn PDF document text
    • http://hookup756.fun/lean_management_system_six_sigmaeej4q.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/sport_wr30m_watch_price.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pavabiza.atwebpages.com/79173461054.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/wenajusiwevuvapotamizuxo.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/what_caused_the_stock_market_to_crash_great_depression.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_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 4948 bytes
SHA-256: 467fdd01940e77c83b9a6543e22a2839f5ce2aa728803b1d5b1db6d36a70fe78
font_01_sfnt_off0000ff3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3B 12556 bytes
SHA-256: 95c31b567c445182ff9c40a52333876a127e0b880f689df80a6242c3ca831dd6