Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a5a08a6ea10470…

MALICIOUS

PDF

100.8 KB Created: 2021-03-14 19:49:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ed72c9d1e741003bd4e4f8ac1ad9df9a SHA-1: 6e40745e1adc48e203c06c9c26b691e194f6d968 SHA-256: e6a5a08a6ea10470ed9f5d8d63716b9f1f2949a10af83b4b15a50a936514f494
206 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the document's structure suggest it's designed to redirect users to potentially harmful content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://bologen.ru/wix?keyword=keurig+model+k40+user+manual PDF link annotation
    • https://xovoxabazilepot.weebly.com/uploads/1/3/6/0/136054719/2943192.pdfIn PDF document text
    • https://midonoguta.weebly.com/uploads/1/3/5/3/135347847/femakokizo.pdfIn PDF document text
    • http://blaugrana.ru/44196112645y2ams.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/169c3.pdfIn PDF document text
    • https://gegivibubijob.weebly.com/uploads/1/3/4/5/134507206/gevuw-gegozibaxomusux-kunodu-javofefa.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/7757f92d2.pdfIn PDF document text
    • http://hotita.fun/70622498948072ku.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/f71d0860-591d-4dd7-9e9f-dd4e64f5e96d/kunupuveponibej.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/fotugoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db67d099-b88e-4126-b0d0-4275393c9dd1/deskjet_6988_wireless_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/65009632317.pdfIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_83642132563e4a55aee1d23b72d561b9.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_e35ae673111a43a6a6dec397e5eed500.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/377d6d5c-6cf1-4fae-a270-95f87d811f56/98970898834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6551f65a-e9ae-4a1e-86a7-4d4e1eb84a9d/sims_3_world_adventures_java_game_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6117ebb-25ca-4bca-a465-ec9987b7ea6c/fujitsu_fi-7160_scanner_price.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/naphtha_reforming_reaction.pdfIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_e66f716a2a1a42c1a35e7ea381c98f39.pdf?index=trueIn 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_off00014c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C51 5408 bytes
SHA-256: 156364e5fcff93f506eb34a42cd445cd44e043e42229e0e4ad64d3f7b9cf3ca1
font_01_sfnt_off00015ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA4 11812 bytes
SHA-256: 9d43e976b95db0dfdc4940a020c7990854c306442ece47b130aa583a74f6c505