Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c02f9dae321e436…

MALICIOUS

PDF

105.8 KB Created: 2021-04-19 00:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 403cfae245c2c41653d46430983e3705 SHA-1: 265be91a8ce8defaf4eac94e4c36ee825b1443fc SHA-256: 0c02f9dae321e4360c8bae8a1f7eb2ed8634a7cff99968ace4c3e6dba347b85a
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to link farms and disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, likely intended to trick users into clicking the malicious links.

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://resalured.ru/strik?utm_term=what+is+the+earth+primarily+composed+of PDF link annotation
    • https://cdn.sqhk.co/rovifatira/fAtOiib/recharge_mastercard_online.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/gcMjhji/birkenhead_sixth_form_college_staff_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470224/normal_603f5a9cccc7b.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/Up6khih/gafosuve.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/xawef.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/zulolefuzetofiberedite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468296/normal_603dca9167c63.pdfIn PDF document text
    • https://cdn.sqhk.co/kudewigi/hgsdoib/93765254202.pdfIn PDF document text
    • https://cdn.sqhk.co/semubedogi/owgenkS/acknowledgement_receipt_template_word_free.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/appropriate_outfits_for_first_day_of_school.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385009/normal_5ffe8c7ba34dd.pdfIn PDF document text
    • http://gukabibus.mygamesonline.org/6863922972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_601f990cb08c2.pdfIn PDF document text
    • https://cdn.sqhk.co/sevimifogu/ijjjagc/35150202894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_60432ba8ec324.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/6909c64c-7307-4c65-8205-eaef1a342d86/88626079574.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/buzilexufonigurabup.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/29395486120.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/keritorix.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/animetv_apk_2019.pdfIn PDF document text
    • http://pexirud.onlinewebshop.net/55168618331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2efced0-a531-4992-a1bd-27a055e9732a/sinopsis_film_the_collector_2009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71db849-31a9-4d0d-8167-06d92b45261c/toshiba_ct_90325.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_off00015c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C43 5508 bytes
SHA-256: e2213d378930b4129443788883e89609a17a4db9b06c105d3dbbad85b4b4bd19
font_01_sfnt_off00016eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EEA 13464 bytes
SHA-256: ab32e0963ea73c35ac43ce3cf58054546f100dae9dba86e95e48994d13ff417a

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