Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9d9eb511367d4a…

MALICIOUS

PDF

65.4 KB Created: 2020-11-28 03:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 905e2f7ac7cb2e6f11bf409f389ff701 SHA-1: 9113beb0987bebcbf4286af1a438433650208d34 SHA-256: 8c9d9eb511367d4a4906b21443306286d2b1d17ed1702ccf8ef4edb1e67b7c99
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to lure users into clicking on potentially harmful links.

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.
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/strik?utm_term=swim+instructor+certification+ymca PDF link annotation
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/dexunomemuk.pdfIn PDF document text
    • https://ginalanofogise.weebly.com/uploads/1/3/4/8/134886059/8117307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5fae1aff288d3.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/kikevovovut-mitirawibilonu-lerozenawitifi-sixafu.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/dazutun/wubefu.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/31968052270.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/wutimedezirisif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a28e214-d468-4c07-868f-051b40e2e7cd/mirelem.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/allegra_bula_anvisa.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/pogejovamatukujudeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9544f01c-cce5-46bc-b118-c071aa99148e/48004271816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471e189f-e842-41c1-b81b-4ae3ae1ef036/6649372382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/083d1e23-a2f9-48b9-a727-d9a1f3f3340a/75499400499.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_off0000c48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC48F 5292 bytes
SHA-256: f5c0b49e1f8601d98c651d744f1e6643019a48ecbcd74042fa5207770ef384fd
font_01_sfnt_off0000d692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD692 10152 bytes
SHA-256: c6f449b1d54c6c9cc16b48256dacb1dda87cd7f66ce05d3d120841ea76944490

Open this report in the interactive analyzer, or submit your own file for analysis.