Malicious PDF — malware analysis report

Static analysis result for SHA-256 14942348155c9847…

MALICIOUS

PDF

94.4 KB Created: 2021-03-25 23:31:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 48968206eae6f65ed65a34691130733f SHA-1: ef623bcd08bbd6f78ca5908ddb36e3f929f15591 SHA-256: 14942348155c984769bd015f6d13bb8341fc3e16dc5749c16e2cd1550beb16f1
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs point to suspicious domains, and the document body is heavily obfuscated, preventing a clear understanding of its specific payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/award?keyword=add+text+box+to+pdf+adobe+acrobat PDF link annotation
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/bosun-mewivakoji-palozenavovajak-xonuviwofeta.pdfIn PDF document text
    • http://akb54.ru/importance_of_report_writing_in_criminology66s7g.pdfIn PDF document text
    • http://cactusvpn.live/mobile_legends_bang_bang_hack_skincbzp5.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/gakorek.pdfIn PDF document text
    • http://gobigs.space/carl_jung_personality_test_history4jst5.pdfIn PDF document text
    • http://pagebake.com/posamewerosezogabibixogud3vj6.pdfIn PDF document text
    • https://vatedubajepe.weebly.com/uploads/1/3/4/3/134371970/35a8898e6b3.pdfIn PDF document text
    • http://laura-egorova.ru/gazojejugamezurigomelr6ic.pdfIn PDF document text
    • http://goodshopsales.xyz/happy_wheels_unblocked_cool_mathruee3.pdfIn PDF document text
    • https://regasefes.weebly.com/uploads/1/3/1/8/131871592/rofaximekiv.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/fezudo0wq8a.pdfIn PDF document text
    • http://1xbets-reg.site/inflatable_hot_tub_repairs_near_me8glxy.pdfIn PDF document text
    • http://tamasolesodaj.mypressonline.com/58702172841.pdfIn PDF document text
    • http://vumejopiraxu.mywebcommunity.org/61310027387.pdfIn PDF document text
    • http://homeolimp.com/hp_photosmart_7760_photo_printer_driver_downloadurm6o.pdfIn PDF document text
    • https://sojagimizalafar.weebly.com/uploads/1/3/5/3/135317111/zodamubi.pdfIn PDF document text
    • https://dipakexamima.weebly.com/uploads/1/3/1/0/131069759/delegatovabe-tipamelivuzabi-puripaxonemole-niwapewoxol.pdfIn PDF document text
    • http://strahauto.website/72413773537gtch8.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/de744ea0-a0fd-4f27-9a09-03c811c0415f/mississippi_permit_test_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1919a9a5-0e1a-4a0d-891c-da295ff91982/35405318038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a44baa2c-1875-44b2-8243-d074476ef19d/tumezeduretedovegew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c54aa50-adf1-45dd-939a-f6ec2da9c9f7/does_apple_have_audiobooks_subscription.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71585790-65c9-4695-aa68-1fca4bdcfd28/new_marvel_movies_coming_out_in_2020_and_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114e9591-e393-46cf-b685-6dbdf88dc3f6/add_watermark_text_to_using_itextsharp_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd3f416-b27a-41bb-9a11-73bab8513ad6/which_are_the_3_crucial_components_of_information_security.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_off000132d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D0 5136 bytes
SHA-256: 19ccfac1902c6ecf0cd0ed065d3b091d452a853c69791e218014d8d577001b9f
font_01_sfnt_off0001445c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1445C 11524 bytes
SHA-256: 731e28a0555ebc80e94a619a86b86ea62a22b1657e34c8d24fc4d5cfb687bc71