Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1b480b36bf0ddc…

MALICIOUS

PDF

103.9 KB Created: 2021-05-16 06:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2fdc1f72845160068a084e9b90f73edf SHA-1: d4f78e802a426e678f81332f7d43a69f6497268d SHA-256: 5e1b480b36bf0ddcfbdcd564b28658242d5590cb2750a4442db4c9e97b050c5a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were extracted, the PDF structure and embedded URLs point towards a social engineering attack designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/strik?utm_term=eurodesk+sx2442fx+manual PDF link annotation
    • http://nidewopovuwubo.mypressonline.com/tuwixesofukuburewole.pdfIn PDF document text
    • http://tobubolixej.iblogger.org/quran_al_mulk.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/pivofovumoxizodororag.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/desikiduf.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/how_to_reschedule_your_dmv_appointment.pdfIn PDF document text
    • https://rijozixofufake.weebly.com/uploads/1/3/4/5/134509282/f31f10bc.pdfIn PDF document text
    • http://sadugumipid.iblogger.org/77696636858.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/281809.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/94243a4e0d7d2e.pdfIn PDF document text
    • http://xejapuz.getenjoyment.net/asuhan_kebidanan_pada_ibu_bersalin_dengan_atonia_uteri.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/79409034750.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/what_is_true_metrix_control_solution_used_for.pdfIn PDF document text
    • http://konolux.medianewsonline.com/24938713784.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livagutavox.epizy.com/curriculum_meaning_and_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78dcab62-beb7-4b8a-ab41-8570082d2706/risefudamiresawixadejuni.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/wizizapexi.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/bevolirevuxajikufoxokape.pdfIn PDF document text
    • http://gamelaluwer.myartsonline.com/xewizusopupipalosinedolid.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/92625193184.pdfIn PDF document text
    • http://joboberunora.rf.gd/96201722967.pdfIn PDF document text
    • http://lutukoxu.rf.gd/binary_code_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c1aa49-66f1-4aa5-b231-28143ae4b509/rock_band_4_ps4_guitar_compatibility.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CBC 5360 bytes
SHA-256: 0e1e891dc0acb0e976488f17ff23393d7304dde7725c11011babe09f9189595f
font_01_sfnt_off00015eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EEB 2164 bytes
SHA-256: e1d360b1f36b9c9a9e4aad416cbf0815c4b4c8d6e4b032a89d899bc2ff80327f
font_02_sfnt_off00016842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16842 12336 bytes
SHA-256: fdada4de7988ef753d0b929845eab6aa062cc89f6822eda74c1aa896ee0588b8

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