Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eeb6707d38af06e…

MALICIOUS

PDF

79.6 KB Created: 2021-03-29 19:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 353e19ef4717449a12dc3177f1061107 SHA-1: a2cbef02d01a1adda34db9f746aab6898d00a4b2 SHA-256: 4eeb6707d38af06ec9aa260cded4056406da8d197073d0f229b1e430890131ab
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely using a spearphishing attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://gimoguvi.ru/strik?utm_term=nonfiction+reading+practice+grade+4+pdf PDF link annotation
    • https://newafiramolik.weebly.com/uploads/1/3/1/0/131070062/b0a5701e1e951.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/lugotem.pdfIn PDF document text
    • http://effektzhizni.ru/2007_drz400sm_service_manualxd1hj.pdfIn PDF document text
    • http://tuvosudokalidu.scienceontheweb.net/nezesijizaresosukive.pdfIn PDF document text
    • http://numulul.mygamesonline.org/goxagezitikav.pdfIn PDF document text
    • http://it50discount.pro/256937446782ykhh.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/gjhhfIq/kijerepujazasipe.pdfIn PDF document text
    • http://tonerinkstore.com/irelia_bot_lane_guidew60hx.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/igGOgio/drift_bike_racing.pdfIn PDF document text
    • https://dezuvamugofa.weebly.com/uploads/1/3/4/1/134131805/2084113.pdfIn PDF document text
    • http://mixit.info/overcoming_gravity_booko9663.pdfIn PDF document text
    • https://nabezaxe.weebly.com/uploads/1/3/4/8/134852032/saxifid-ritikovarasix-dojelita-vadalalezenur.pdfIn PDF document text
    • https://cdn.sqhk.co/gigatakel/drXhVgf/62130746511.pdfIn PDF document text
    • https://vuligezu.weebly.com/uploads/1/3/5/3/135391643/juwuvoguzijavuko.pdfIn PDF document text
    • http://yesstore.pro/zusigumidururaneregypqv.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/gjjb9hO/95969521562.pdfIn PDF document text
    • http://gtomishebs.xyz/la_metamorfosis_personajes_y_sus_caracteristicasqdusx.pdfIn PDF document text
    • http://jajokojunewi.mypressonline.com/losisupuzenubotumon.pdfIn PDF document text
    • http://mavpa.fun/594628597546afql.pdfIn PDF document text
    • http://smartcreditcheck.info/how_much_does_a_johnson_9.9_weight4zw3y.pdfIn PDF document text
    • http://smartcoin.design/14580935974m2yav.pdfIn PDF document text
    • https://cdn.sqhk.co/maxolavoweje/ghzJ0je/13381342192.pdfIn PDF document text
    • http://xinorigevidemo.iblogger.org/toxins_in_food.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mabagojovas.epizy.com/the_drama_of_scripture_summary_book_review.pdfIn PDF document text
    • http://bamusob.rf.gd/jikosexozogugu.pdfIn PDF document text
    • http://fubusomarixemuw.rf.gd/72793296068.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/leginaxagujuxoso.pdfIn PDF document text
    • http://jomerijokera.rf.gd/sodavo.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_off0000f8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DB 5172 bytes
SHA-256: 30ee25c0ae0bbc88bd6562f98294607a8fb52e6301feefbcb7048a0ac95e3403
font_01_sfnt_off00010a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A95 10964 bytes
SHA-256: b4718a7098af6fe882f3a1f038d22888a4298e3825d99301e90b89cfaca49951

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