Malicious PDF — malware analysis report

Static analysis result for SHA-256 df59b91f6ca54297…

MALICIOUS

PDF

81.1 KB Created: 2021-04-10 21:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6916a4f2454d3d35d003934c3f5b542c SHA-1: 557140dcc228d5c880ed6f77503a48b69b991893 SHA-256: df59b91f6ca5429744b4956f271bab4ae34939d075676a325b6f91c70835223a
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 0.9997

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://druttle.ru/strik?utm_term=life+together+bonhoeffer+pdf PDF link annotation
    • http://ttttrrrr.space/78327044335bxy0e.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/46368a2a4.pdfIn PDF document text
    • https://cdn.sqhk.co/bapulofuw/kjiE8hb/aliexpress_synthetic_lace_front_wigs.pdfIn PDF document text
    • https://gidibaxatum.weebly.com/uploads/1/3/4/8/134889182/tisevejogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457854/normal_604d274d4694c.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/Uhf50b9/vinakajapumokolu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388285/normal_5fef6d1dc9349.pdfIn PDF document text
    • https://zazivepug.weebly.com/uploads/1/3/4/3/134359823/rinekimikap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477623/normal_5fd8bf1d3ff3b.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/dhgKSKd/asteroids_near_earth_august_2020.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/difference_between_binomial_cdf_and.pdfIn PDF document text
    • https://diniporugixufov.weebly.com/uploads/1/3/1/8/131856235/6435025.pdfIn PDF document text
    • https://zeduwekikozive.weebly.com/uploads/1/3/6/0/136050246/wipenogosujodikadona.pdfIn PDF document text
    • https://kakijukiwobak.weebly.com/uploads/1/3/4/3/134322026/lazefadofavuv.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/7ggp0ie/offroad_car_simulator_3d_download.pdfIn PDF document text
    • http://xtreme-sport.ru/how_to_connect_logitech_x-540_to_tvvs3kl.pdfIn PDF document text
    • http://rrrrkkkkk.space/68335902352vn5vw.pdfIn PDF document text
    • http://kafofal.mygamesonline.org/kotasokidetazuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410448/normal_6039355ef219e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jugomirusulove.atwebpages.com/40480338073.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 4964 bytes
SHA-256: b8728800ce36ea54eef545db8a981258e9ec7d1177c81e06e4580852ca32e114
font_01_sfnt_off0001139b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 10548 bytes
SHA-256: 2805a9af67964286e3e038d84fc00ae9dbc2ca89157e311468f2a58677d8ec1d

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