Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14fc0225cbd8e30…

MALICIOUS

PDF

94.3 KB Created: 2021-03-17 18:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e038fe3bb2f8d9bd1a21db9a38e82bb9 SHA-1: 96e5578c5245ae84a1ac7cfe93c7d8a7e87c7f75 SHA-256: d14fc0225cbd8e3015967f53a76f1a554483d9f2cb914be9cbd21dff8948bba5
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 0.9990

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://fokemale.ru/strik?utm_term=how+to+country+2+step+dance+workshop+by+michael+thomas PDF link annotation
    • http://bella24.xyz/holmes_air_purifier_filters_hapf600ycmg5.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/what_is_social_research_and_its_characteristicsjvi6u.pdfIn PDF document text
    • http://artrosil.xyz/nombres_que_aparecen_en_la_biblia_de_mujeresjmira.pdfIn PDF document text
    • http://mybiol.site/25605743730388ks.pdfIn PDF document text
    • http://recepty-dd.info/9899917500060uaj.pdfIn PDF document text
    • http://qrettalq.online/can_you_fall_back_in_love_with_your_partnerkfo6n.pdfIn PDF document text
    • http://intereriia.com/how_to_create_a_freeze_frame_in_premiere_proe7q79.pdfIn PDF document text
    • http://powerhdniy.space/how_to_write_a_chemical_equation_class_10z3h2n.pdfIn PDF document text
    • http://help-nanny.site/97277040925flzy2.pdfIn PDF document text
    • http://am-sound.ru/ford_mustang_workshop_manual_downloadmnxvj.pdfIn PDF document text
    • http://remontnatali.ru/my_beloved_world_chapter_2_summaryuacsu.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/jeVupKs/9571181460.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/wicYjcR/73347384412.pdfIn PDF document text
    • https://cdn.sqhk.co/jodanonot/hcggoY1/561208275.pdfIn PDF document text
    • https://cdn.sqhk.co/tunaluvum/fokhehd/2225042720.pdfIn PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/ajfHifu/large_rounded_corner_mirror.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/jagigc3/90162180974.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/gKhfNgh/road_draw_climb_your_own_hills.pdfIn PDF document text
    • http://profyhouse.ru/965358180979mde5.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/ggibhij/5k_to_10k_app_review.pdfIn PDF document text
    • http://fresh-ita.space/fowowemewejuzowutqjbl3.pdfIn PDF document text
    • http://creditstar-kabinet.com/the_immune_system_4th_edition_peter_parham9csfw.pdfIn PDF document text
    • https://cdn.sqhk.co/xinefegepe/hkE0hcu/webabukabivabubexagedufin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9B 5804 bytes
SHA-256: 17b4775a9152985b3609b29e8e02b48795b4886ff6958ee086840e9c7470144b
font_01_sfnt_off00013248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13248 10364 bytes
SHA-256: ce991f67b20cc631eb5a54bd1735d7a5a88ebc61921ee61f5f21cca7f58d2992
font_02_sfnt_off000155dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155DD 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15