Malicious PDF — malware analysis report

Static analysis result for SHA-256 386b1abfefc4384e…

MALICIOUS

PDF

92.0 KB Created: 2021-03-23 22:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f4392d9ce8cb98518f82dc8209ceaf48 SHA-1: 22158196cf6b1e84c8010565532ccfebf018421a SHA-256: 386b1abfefc4384e3d31d89529d9f10e521fb345e875736816b341abc9ef002f
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains numerous embedded URLs, with a notable concentration on disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain keywords related to machine design, likely a lure to disguise the phishing nature.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/award?keyword=manual+concrete+block+making+machine+design+pdf PDF link annotation
    • http://romeita.fun/niravelejsbfuw.pdfIn PDF document text
    • http://litvinenko.xyz/44169697822ox21q.pdfIn PDF document text
    • http://tpdreport.com/turazatumabatufemlt34.pdfIn PDF document text
    • http://kokilubowo.22web.org/psychology_internship_report_slideshare.pdfIn PDF document text
    • https://widedajixefur.weebly.com/uploads/1/3/5/3/135312737/517793.pdfIn PDF document text
    • http://padojuputiki.iblogger.org/math_games_for_grade_1.pdfIn PDF document text
    • https://vosojexurixug.weebly.com/uploads/1/3/1/0/131070535/dizat-tozelozemad-fumusob.pdfIn PDF document text
    • https://vivorewipaxuje.weebly.com/uploads/1/3/4/3/134365477/4362677.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_92d2081cff714e269d9283c6c965d720.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/28913252581.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/captain_underpants_name_generator.pdfIn PDF document text
    • http://nuxajirurus.epizy.com/carnival_cruise_donation_request_form.pdfIn PDF document text
    • http://buzawasilugije.epizy.com/surat_al_waqiah_latin_dan_terjemahan.pdfIn PDF document text
    • https://82a15d5c-09b3-4b2c-b6d5-cdf01964cb25.filesusr.com/ugd/5adcb9_039c7eebcb7b4f519459e2508187f948.pdf?index=trueIn PDF document text
    • http://nobajoxeruxepin.rf.gd/74725640744.pdfIn PDF document text
    • http://webakipi.epizy.com/70032100090.pdfIn PDF document text
    • http://xoxozuzupa.rf.gd/2003_chevy_s10_stereo_wiring_diagram.pdfIn PDF document text
    • http://vofimefokugof.epizy.com/embed_images_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/blackberry_9900_software_free.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_off0001275b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275B 5776 bytes
SHA-256: 98b41326c78c8f95fc9d064dd504827fd8bb6dbf06a970ab52d6937b8f8bc7b8
font_01_sfnt_off00013adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADC 11748 bytes
SHA-256: e97af7615b94a7d57c219ddf0f4b59286b053edb583c2cd59d096c99620a795f

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