Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d7204e7c39d641…

MALICIOUS

PDF

53.9 KB Created: 2020-10-27 12:24:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 98a66b1f1197fa8fcb7c798454878df8 SHA-1: bbaafc447e77e11de882040d0a468086b4138328 SHA-256: 67d7204e7c39d6411fc070b19747c414af3f00b80f2467a6140aaf8ce5411d56
214 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/295c920.pdf.
  • 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://cctraff.ru/strik?keyword=mexico+crime+and+safety+report+2018 In PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/295c920.pdfIn PDF document text
    • https://sukowaletudevux.weebly.com/uploads/1/3/0/8/130874669/e5513bda10de.pdfIn PDF document text
    • https://koxarakofawel.weebly.com/uploads/1/3/4/3/134310925/kebidufowijukepex.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/147f287276ec8d.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/5621482.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/fc2447.pdfIn PDF document text
    • https://jusujonolixutuw.weebly.com/uploads/1/3/1/3/131379247/sotubatuje-lesade-jowanilovivarag-tubepavarodoror.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/c7c8f72a3e99e.pdfIn PDF document text
    • https://mukokoloraji.weebly.com/uploads/1/3/4/1/134131612/pizegabesatipuv_kubimesevugel_jalelotanudobib_laganegufuvek.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/xupurukomakufogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8043/1774/files/lofudefaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2856/8984/files/40444649270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7289/6672/files/estenosis_mitral_electrocardiograma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2673/3982/files/tivuvinadofefijuxes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4256/9368/files/22687179345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1595/3320/files/sims_android_apk_offline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7304/3102/files/after_eating_dua.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5515/1774/files/lector_de_liviano_y_rapido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/live_sports_tv_app_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/characteristics_of_archives_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/bufaxuzojezatepufuton.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_off000091bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91BD 5964 bytes
SHA-256: 551e868ebc82a77a90bfa5a9ada5d92186146c1625736e886b4f89979ef7b1e2
font_01_sfnt_off0000a60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA60A 11004 bytes
SHA-256: b2d78c11c58605b04cffd6a431b5f65c211b1c1afd334fb6c940f4150d54e0fc

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