Malicious PDF — malware analysis report

Static analysis result for SHA-256 44bea4cb5849853e…

MALICIOUS

PDF

87.0 KB Created: 2021-03-10 15:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 49686d731d7d5d365cfbf83497785c57 SHA-1: 942b026cff4fbaec1718f722aca1a6c9e54ea28c SHA-256: 44bea4cb5849853ee18cd6e728f9fac18269518b54681a9e3a92cc6ed3de440e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=one+tribe+dance+festival PDF link annotation
    • http://xtreme-sport.ru/36870673387nw4pl.pdfIn PDF document text
    • https://murunabijijot.weebly.com/uploads/1/3/5/4/135401069/ligix.pdfIn PDF document text
    • http://mgacessoria.online/baby_grand_piano_for_sale_new_brunswickmk3g8.pdfIn PDF document text
    • https://cdn.sqhk.co/taxodisilif/hczibjh/pictoword_level_96-_100.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/sarebiwililazijunub.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/cuales_son_los_trece_signos_del_teatro.pdfIn PDF document text
    • http://bitcoins-profits.com/critical_thinking_questions_exampleslsoeu.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/dofekibar-tasumibupo.pdfIn PDF document text
    • https://cdn.sqhk.co/rokogikapo/ethjigl/luluvefewi.pdfIn PDF document text
    • https://kebiluxo.weebly.com/uploads/1/3/1/4/131455508/bde0e513aa64.pdfIn PDF document text
    • https://cdn.sqhk.co/lokojagivel/hVieibr/christmas_party_music_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/ahii0Ze/94929973123.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/best_tarot_card_for_career.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022fbe16-b658-4b41-9eac-56a81a9e30ce/what_to_write_in_a_performance_appraisal_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac2f53f-29d7-4a34-9ea7-43bf5c0cf420/fallout_new_vegas_pc_mods_steam.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/mr_coffee_cafe_barista_cleaning_instructions.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/recommended_maintenance_schedule_for_2018_honda_cr_v.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a73ba2b-8493-4679-b971-97bd43d4eb9f/matricom_g-box_q2.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BC 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off000100b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 5240 bytes
SHA-256: ed12f91b57f21c5c413158887395a6cf8471ccb02eb3443f55ac694d331f3b58
font_02_sfnt_off00011293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11293 11972 bytes
SHA-256: 6e068e883d30df340c751e9af44719ab3b73d8adda3b38b4e9f78b2f6e67d549
font_03_sfnt_off0001395c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395C 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f