Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e62c89de08a88f…

MALICIOUS

PDF

77.1 KB Created: 2021-03-22 14:11:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 65a11dc6cf41856fb244d0886e56b057 SHA-1: 9ac3af849f64a60fd813ce6271e5c3958a89e6c8 SHA-256: 18e62c89de08a88fef00599a5bf950321ff66a46cb898a97dd91bf59a9e54fcb
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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://botokaw.ru/strik?utm_term=ancient+magus+bride+episode+4 PDF link annotation
    • https://cdn.sqhk.co/damapegapi/FQhbvgd/54564575563.pdfIn PDF document text
    • https://xobagesimijuvu.weebly.com/uploads/1/3/0/7/130776740/wirujo_poluwoxavotiwad.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/iahgNDf/59859596180.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/1qidhhp/zizemozoxewijumenizozip.pdfIn PDF document text
    • https://tejojobowadame.weebly.com/uploads/1/3/0/8/130874570/gatade-keluxi.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/l6Gnift/brief_marketing_plan_example.pdfIn PDF document text
    • https://gopebuxagofu.weebly.com/uploads/1/3/2/6/132681698/vumufolorure.pdfIn PDF document text
    • https://gidiwukos.weebly.com/uploads/1/3/1/3/131381706/3ad55a0f75316.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/dSjhM21/free_music_ringtones_for_apple_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_4aaa2c5aafaa47b58f9916e70ff7beb2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f61cd4b-7ddc-41b1-a1ed-f096aed42a44/vazogeziv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/591d3951-dcc5-4941-99f7-3739356257ef/kodesalofegoxexela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ae6426-837d-4161-ab6f-9d0aec232542/zubegogelufavekema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5256d935-0951-4f83-9b17-8db79821e04a/12805180010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4136774e-e206-4165-b37b-dad7084124f4/shadow_and_bone_season_1_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd512f0-a34f-4c7c-8a2f-451b640eaf23/hp_laserjet_p1102w_manual_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dee9da9-dba7-443c-8911-394a2226d5d0/91529278633.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/biker_boyz_tamil_dubbed_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6a7472-fb7a-4f92-8cef-edf03f5fbd1b/hp_laserjet_p1606dn_printer_specification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc656878-5bf2-477e-b9cb-6637d4423159/can_a_software_tester_become_a_developer.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_92356ac3f6b4492d9c9f5e947b4e4e46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/bisizetufepekeju.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_off0000db5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5B 6272 bytes
SHA-256: 1c7e62c1eefe1753588f978e088341bc9098ebdc2454de692406e83709574d77
font_01_sfnt_off0000f0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 5580 bytes
SHA-256: dee0e0c32e30a02580ad051a3151910f89c045f3eec1cf39839d6be762bd2643
font_02_sfnt_off000103cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CF 10520 bytes
SHA-256: 585f547dabfc611eb35e87023fefca45e8dba993cfecc15f30c83eb13af1cd40