Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c59cd91bcbc940…

MALICIOUS

PDF

87.4 KB Created: 2021-04-16 01:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: eddf046a33d636318be37edbede60b08 SHA-1: 55648b3a81651361ae7370ffd9b1b21ecc17a4a5 SHA-256: 09c59cd91bcbc940537851759059a7a1a2d6f6aa0fb75cc7eeaa8964ea89fa05
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings for unrelated terms. One prominent URL, https://mezovuduw.ru/strik?utm_term=chick-fil-a+superfood+salad+discontinued, is directly associated with the malicious detection. The heuristic 'SE_URGENCY_LURE' suggests the document may contain deceptive text to prompt user interaction, further supporting a phishing or malicious download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.
  • 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://mezovuduw.ru/strik?utm_term=chick-fil-a+superfood+salad+discontinued PDF link annotation
    • http://instgramcopyrightdispute.com/wellness_coach_jobsldptp.pdfIn PDF document text
    • https://cdn.sqhk.co/birofinud/JgjLarl/paypal_stock_symbol.pdfIn PDF document text
    • http://dommasters.site/5824920599ya5x.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/jiLjjhb/fallout_shelter_pregnant_dweller.pdfIn PDF document text
    • http://moreprodukti.com/romeo_y_julieta_reserva_churchill_2008y04cf.pdfIn PDF document text
    • http://zathkatow.xyz/14851341855tojgl.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/rbDiije/top_german_tank_aces_ww2.pdfIn PDF document text
    • http://excschool.ru/pajoravopudua2fgn.pdfIn PDF document text
    • http://copyrightproblem.com/48186120643wr33p.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/aicgehc/old_meaning_of_piffle.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/ijgjrf9/84137076160.pdfIn PDF document text
    • http://startbastar.online/mebinijapabejipemugepedsnxny.pdfIn PDF document text
    • http://mscgis.net/mathematical_logic_for_computer_science_gatebg4l3.pdfIn PDF document text
    • http://familyit.info/ejercicios_palabras_agudas_llanas_y_esdrujulas_4_primarianr6dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_fd62ea5823964f38838211782e465675.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/17399436874.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/tazuzodokob.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/singer_quantum_stylist_9960.pdfIn PDF document text
    • https://c6b89c2f-dc7d-490d-a648-077c51828da9.filesusr.com/ugd/29ab01_ca448555ad1e404db62d63a3a3f10e80.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/73087179787.pdfIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_e39bce0985dc4ef9bbfa34be349c6962.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeponowon/arvo_poster_guidelines_2018.pdfIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_3879e801c2164dc9b5dd979f4f695cac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/build_up_sound_effect_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/how_to_reset_my_honeywell_hot_water_heater.pdfIn PDF document text
    • https://5de6e22f-064f-4859-b003-4eaa502c5056.filesusr.com/ugd/2609e6_bc740f960f994e69b023a7eba5437fe1.pdf?index=trueIn 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_off000117d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D3 5244 bytes
SHA-256: 2c61a8878270d5987f90f3e5709c16ec5bef5d0aba2a27359a5178c87de90edb
font_01_sfnt_off000129aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AA 11180 bytes
SHA-256: 7d20952273db546f2349fa1ce5783b052fcf51828adbd68612ae8d1b6bcd5bbe