Malicious PDF — malware analysis report

Static analysis result for SHA-256 1232ad928f0eb1c4…

MALICIOUS

PDF

78.5 KB Created: 2021-05-25 10:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 569c13ed4f29c11408f73eb8966941f6 SHA-1: cd7284f064c83bc93793ec5aa4ca288ebee70194 SHA-256: 1232ad928f0eb1c4b241e5b2acb3f01677ac9873e1ff2b1225e356455aa189a4
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, using a deceptive title to encourage downloads. It contains numerous external links, many pointing to SEO-optimized PDF hosting sites, suggesting a link farm designed to distribute malicious content. The primary redirector URL is identified as a potential phishing or malware distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/strik?utm_term=downton+abbey+script+book+season+3+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405179/normal_5ffff73766b47.pdfIn PDF document text
    • https://melonugijiroduk.weebly.com/uploads/1/3/5/3/135325977/3a9a1b37a54c86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480878/normal_603e67740018e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_60390b93cad69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373983/normal_5fe0cab7099dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467322/normal_601245dc01893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416154/normal_605c33fbea8bf.pdfIn PDF document text
    • https://tamusibexo.weebly.com/uploads/1/3/5/9/135966636/9047942.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418579/normal_5febaab8e9d70.pdfIn PDF document text
    • https://xanuzejo.weebly.com/uploads/1/3/1/6/131637194/gometisovudebesuwiju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/affiliate_marketing_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/lepegava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add8cd32-97cb-4b22-939a-714f2e745ac1/what_does_academic_conventions_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/list_all_sheet_names_in_excel_vba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed246580-4a0b-41f3-9ff3-0836bd5809af/xuwajanoxuxutaramixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d277a59e-c3bb-41a7-bf1e-a6a500750679/64621628545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74cc03ab-64f5-4061-967b-aa002fd36e9e/26586050389.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/avoca_surf_cam_surf_report_coastalwatch._com.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa18d1d-b14d-4cf0-b886-f883bb884b54/como_instalar_impresora_hp_deskjet_f4480_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/semufigareratudavo.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_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 5708 bytes
SHA-256: 9c407ae79150d07de97310cddd9f9d9c0f248ba98ef61b21c30f54688abdc960
font_01_sfnt_off0001018d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 12044 bytes
SHA-256: 738ac2cadcfbc9a0aed1b56fa5e13dd6ceaeb7ead3292dea9a0d2c59d6a1baf4