Malicious PDF — malware analysis report

Static analysis result for SHA-256 877be0fd13f78571…

MALICIOUS

PDF

101.0 KB Created: 2021-04-01 06:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6e455f0eaeb5795108108ad732332300 SHA-1: 61b9eff7cbaff106e92f2abdc01632f4264c7f0f SHA-256: 877be0fd13f78571d5218c86ac764bd8d21acd229fd5e148e9ebc7babf59a251
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO spam operation. The primary URL, 'https://dugedepap.ru/strik?utm_term=elite+dangerous+best+keyboard+layout', is presented as a lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to drive traffic to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=elite+dangerous+best+keyboard+layout PDF link annotation
    • https://rebuxikaxaj.weebly.com/uploads/1/3/4/6/134668288/a156f74ed1.pdfIn PDF document text
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/5047588ddf51ce.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/INicpal/49387619459.pdfIn PDF document text
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/a16a8bb880.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/jeiboym/64683786191.pdfIn PDF document text
    • https://cdn.sqhk.co/wirumedaba/EPuhfhc/screen_time_per_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/Kggcrjg/9306724214.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/NTWjZig/17245652312.pdfIn PDF document text
    • http://gerajite.iblogger.org/dream_meaning_teeth_falling_out_pregnant.pdfIn PDF document text
    • https://cdn.sqhk.co/tesadubozino/FidfFhb/zig_zag_lines_clip_art.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/AUidege/29379627754.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/0jbNd6c/open_laparotomy_and_bowel_resection.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/jcQggic/xrecorder_high-_quality_voice_recorder_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca32823-8861-4cba-8cf1-704695f37c0a/biology_osmosis_worksheet_answer_key.pdfIn PDF document text
    • https://77cbb24c-feae-490b-854c-0a9d4db21a85.filesusr.com/ugd/3752ea_f80eae360e9f4955b34d8678574c862a.pdf?index=trueIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_04ab15c02c344f33a2b2ed47a0c244a3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc202fb-c751-4fda-a812-4061ea5a3b86/79553966477.pdfIn PDF document text
    • http://vininotubosom.epizy.com/51260563185.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_off00014e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E40 5256 bytes
SHA-256: 8a9d29fc5d83801b15d1f0a036f33dff46d87081c0c3d45719970b192cf5a046
font_01_sfnt_off0001603c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1603C 11348 bytes
SHA-256: 8cc86a367c8fcc2df8b49fcfd4847adbada28141419740959e49534fb54a6e23

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