Malicious PDF — malware analysis report

Static analysis result for SHA-256 067febec038103d3…

MALICIOUS

PDF

77.7 KB Created: 2021-03-09 06:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 44159acaa359c1e139cb6f1cd51d5487 SHA-1: 1b2f62778421a350dc79038eece579f4e3358d3d SHA-256: 067febec038103d3ca080d30c234f6d6acd314dd8a512991d3b27c7310b43e14
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 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=bmw+e30+repair+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367922/normal_5fe3e0b8ce781.pdfIn PDF document text
    • https://goxejebifebiv.weebly.com/uploads/1/3/2/6/132682819/9631761.pdfIn PDF document text
    • https://vozosirebuvova.weebly.com/uploads/1/3/1/3/131382942/lideliti.pdfIn PDF document text
    • http://zanodopowe.sportsontheweb.net/why_is_there_no_dial_tone_on_my_cordless_phone.pdfIn PDF document text
    • http://srakan.space/2397589107043ncx.pdfIn PDF document text
    • http://7gusevshop.space/movie_maker_pro_reviewsagbxk.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/bc01a8.pdfIn PDF document text
    • http://damvglaz1.xyz/45569177011nhrc.pdfIn PDF document text
    • https://penusifobituje.weebly.com/uploads/1/3/4/3/134314418/gizafafenunul_daduvenak_wuzuxuf_veximifenofiw.pdfIn PDF document text
    • http://samozanyat.info/integral_of_esinxcosxtiewi.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/77437783180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_602f5833529b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_602d859ebe025.pdfIn PDF document text
    • https://nafugawiwira.weebly.com/uploads/1/3/1/4/131438392/2263301.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/sixumuvanobikovuza.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/d9ee61a7-641d-4ef6-9ccb-db71f8377d87/percy_jackson_and_the_olympians_series_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de4bbbc-51bf-418e-bc85-554600f81980/manual_de_instrucciones_grabadora_sony_icd-px333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/625b5ecc-d46e-4931-8ba2-41a60893e6e9/best_software_development_company_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7e29dc-88c1-4512-9d14-ab8b4f8ad231/25637900941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cba6d41-4a5c-4315-9896-8781e2101203/57518369148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8039318a-ba31-4461-81aa-15a363584e5c/pidageviweweri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e209cb3a-ac39-4af5-9b67-35eec38f5260/zinojedotumike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d015dc3-85fa-4964-8895-6e4c0510c9c5/what_would_cause_your_dryer_not_to_heat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dddb98e-7b33-4d19-b970-ce0735acab0e/sofuxelebojubat.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_off0000f2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 5456 bytes
SHA-256: 9b7f67b33e568d8ed9bfd60eb69aa850e3c46904f0a0f669d816884ddef732b3
font_01_sfnt_off0001055d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055D 10384 bytes
SHA-256: 92b7b7ab9178ea9e27e56f6864b2fa4f329f99478acea78e3181ba219e6eb412