Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c6322313ad485a…

MALICIOUS

PDF

84.4 KB Created: 2021-05-13 06:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 922bdd2baa7ba0e22394f31cb2a67e89 SHA-1: 71b3a77764801c8b647df154299b697f4b5d4f03 SHA-256: 15c6322313ad485a5171f6a8448c125d063c3fe804d531819d187c9bebdd41cd
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 0.9992

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://leonvi.ru/strik?utm_term=fallout+4+graphics+mod+xbox+one+x PDF link annotation
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/rigimudawojego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446390/normal_604ae9ed70946.pdfIn PDF document text
    • https://cdn.sqhk.co/deliwewofok/hiaiaB2/98910442728.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofovam/IYjaJii/xafafowawifazobugitesepir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_6027ec2cd284f.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/hgDHGgd/solatixigitesopimoxoxaxug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_6059e4ada1fb9.pdfIn PDF document text
    • https://tuwowezofe.weebly.com/uploads/1/3/0/7/130775341/ziroxitusi.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirorip/jjdgctk/mermaid_photo_backdrop.pdfIn PDF document text
    • https://cdn.sqhk.co/kotoweraga/uigbW78/ice_cream_cone_jump_rope.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485696/normal_6005995f3da86.pdfIn PDF document text
    • https://gulemexaw.weebly.com/uploads/1/3/4/3/134360266/1417110.pdfIn PDF document text
    • https://gunajogozezulom.weebly.com/uploads/1/3/5/3/135385825/f680450.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://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_8584b436698e41488f8ea8ade68e235e.pdf?index=trueIn PDF document text
    • http://walepoxaz.rf.gd/nozizip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64010aa0-c759-422f-bd93-f7291c8ffcfb/system_analysis_and_design_5th_edition_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab6a26b-fdf5-45e0-980b-8a5522bc9725/does_samsung_a10_support_wireless_charging.pdfIn PDF document text
    • http://zonudafin.epizy.com/hand_foot_mouth_disease_malaysia_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23090aea-090f-4951-b7d9-e520042f7456/furuzowegetedofuto.pdfIn PDF document text
    • https://c5c1e25b-3ca9-4f8f-aecb-0ee3b29cb37b.filesusr.com/ugd/f4fe7b_e1d7de04057e4416b11c2f36d95ecce6.pdf?index=trueIn PDF document text
    • http://vovipajizepab.epizy.com/corporate_social_responsibility_to_community.pdfIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_dfa0e3110a1444aca7245d8df9416b33.pdf?index=trueIn PDF document text
    • http://surofavuvaxono.epizy.com/afraid_of_monsters_steam.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_off0000ff01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF01 5620 bytes
SHA-256: f4060661bd60babbe88ab10255b5c7f477ff066f8c706636f552fc084dfa0706
font_01_sfnt_off000111f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F9 10612 bytes
SHA-256: 7b4e8b747b9f7aa47f5e3e3b75a7565710a2492a01d63ca88f21b63485e784a9
font_02_sfnt_off00013616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13616 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333