Malicious PDF — malware analysis report

Static analysis result for SHA-256 a280da70ef0f17c0…

MALICIOUS

PDF

79.5 KB Created: 2021-03-22 07:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b8bf8c0e9cf385362b569d33f7ffe3b6 SHA-1: 5e64fed02ba79463df859f12be04911997f824d5 SHA-256: a280da70ef0f17c0533a53e6df5f971143262e6bfb59b17e7baedddb5e710d03
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=best+quick+charge+power+bank+2020 PDF link annotation
    • http://iminn.ru/hmrc_online_self_assessment_chatqvjd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417659/normal_5fe92084478b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419225/normal_5ffb2e7368bf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468554/normal_6047cf23842a6.pdfIn PDF document text
    • http://xigujawuruwuko.22web.org/the_burning_room.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_6040ee6994972.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/how_to_start_citizen_eco_drive_watch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474719/normal_603064f01051b.pdfIn PDF document text
    • http://euroshopmn.space/jufotefoluxezajemug973in.pdfIn PDF document text
    • http://tasunixupowife.66ghz.com/speak_english_with_tiffani.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/sadat.pdfIn PDF document text
    • http://dokarukaxita.22web.org/is_the_huntsman_a_sequel_to_snow_white.pdfIn PDF document text
    • http://megoribituvu.iblogger.org/ayatul_kursi_mp4.pdfIn PDF document text
    • http://hdvideo.design/homelite_xl_chainsaw_idle_adjustments68z9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384633/normal_5fdf07d590b62.pdfIn PDF document text
    • http://1freedom.space/47661300220wfgd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527237/normal_60553fff729bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387061/normal_5ffd37fc582dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bonizeza.epizy.com/apk_camera_360_ultimate_terbaru.pdfIn PDF document text
    • http://bememikat.onlinewebshop.net/libro_el_mensajero_de_agartha_zombies.pdfIn PDF document text
    • http://lesuzikabe.epizy.com/7050803019.pdfIn PDF document text
    • http://zalupadinukoz.rf.gd/classroom_behavior_management_strategies.pdfIn PDF document text
    • http://xusapibu.onlinewebshop.net/atem_switcher_price.pdfIn PDF document text
    • http://muropij.epizy.com/74535281182.pdfIn PDF document text
    • http://zigixukotezu.epizy.com/rifigu.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_off0000f7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C4 5908 bytes
SHA-256: dd9d22912aaee79df55a3fa69f77e54157a867c40d6f379c61a6ff98f4369905
font_01_sfnt_off00010bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFA 10784 bytes
SHA-256: 6100f4e7d54c96e7ea866b7810a2de46e836f3b834183f59866b0654047857d8

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