Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b405f6aa3f469df…

MALICIOUS

PDF

83.3 KB Created: 2021-03-24 19:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 86ca679b84789673731192d8f2b5a1d5 SHA-1: 5d1baa9839bc18f1d2dca851f3a20f6a301f4391 SHA-256: 5b405f6aa3f469df2eed6074554165c9526c37c461e84f55a8a5a8906b21da01
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://dafemum.ru/123?utm_term=mac+rumors+buyers+guide+ipad+pro PDF link annotation
    • http://bcipreactivaperu.com/cmo_dibujar_el_escudo_de_costa_rical0jia.pdfIn PDF document text
    • http://mizolaresunade.iblogger.org/79210001212.pdfIn PDF document text
    • http://barojenixumaja.iblogger.org/flowchart_template_google_docs.pdfIn PDF document text
    • http://fbdirect.site/how_to_display_commands_in_autocad87il7.pdfIn PDF document text
    • http://ueuniti.website/download_dungeon_madness_2_mod_apk1u4c2.pdfIn PDF document text
    • http://retys.fun/rinagurojexqoa.pdfIn PDF document text
    • http://mx50off.pro/electric_toy_trains_near_me1l3pm.pdfIn PDF document text
    • http://pravagims.net/948992309351qibt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_7970f4ca886f4e7aa1c615bf6768156b.pdf?index=trueIn PDF document text
    • http://jujeludapivibiw.rf.gd/android_fragment_database_listview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72694579-91e9-4670-9ece-1e54503bbd76/36231923846.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_173163316e444798b6a713b036a386af.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38056698-1af3-46d0-b821-62278c45c6e3/realidades_1_captulo_1a_answers.pdfIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_78a51b11725f4a5ba5be2b9485a523f6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1729ecdd-43ef-4276-8227-bf579afbf22f/the_vampire_diaries_season_1_episode_18_cast.pdfIn PDF document text
    • http://sedilar.rf.gd/uc_browser_untuk_pc_gratis.pdfIn PDF document text
    • http://dajajubofu.rf.gd/castor_informatique_maths.pdfIn PDF document text
    • http://pofazutufugu.epizy.com/norma_abnt_nbr_9050.pdfIn PDF document text
    • http://ziwitiko.epizy.com/luxalutiguwarunibewedeku.pdfIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_9208f9ff9d6a4ea9a17e10b712b5e39b.pdf?index=trueIn PDF document text
    • http://jimomug.rf.gd/19357252721.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_off000106c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C7 5608 bytes
SHA-256: 01a9145b798c5880b71110b495a89ea4a5bee2a632d291111e30c4a6dd1aa0ce
font_01_sfnt_off000119d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D8 11184 bytes
SHA-256: c11aaea5c841f4cbfaa0234c2a1cbc24e5a88f39f920f34d70d8299c9245e5d9

Open this report in the interactive analyzer, or submit your own file for analysis.