Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b06b5f952b65fee…

MALICIOUS

PDF

88.6 KB Created: 2021-03-10 19:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 70ad679a22b0c3d1a3b922b88985f4a9 SHA-1: aa7fa7f3194fe22298379ab68162dd090956ecfb SHA-256: 0b06b5f952b65feebeb1f91af877a208a99a36f517a29ff03253c8d0f50d27a5
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, suggesting a link farm designed to drive traffic or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://soxebez.ru/award?keyword=adverbial+phrase+exercises+with+answers+pdf PDF link annotation
    • http://fujopijur.iblogger.org/ca_ipcc_nov_2019_datesheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479212/normal_60244a7d72cd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470985/normal_5fe4d7270c956.pdfIn PDF document text
    • http://paruweropu.iblogger.org/ranalisotobugima.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374843/normal_5ff2c274d59ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_5fe947b62093e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498366/normal_5fe50ee866de8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/astrophotography_pixel_2_apk.pdfIn PDF document text
    • http://tuwafexom.epizy.com/matlab_programming_for_electrical_engineers.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_37249e88e0464a4787786da36ca31559.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megulu/java_programming_language_for_android_development.pdfIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_cc447f8c16cc4443bfb27aae12b938af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefodek/beauty_pageants_application_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0389b786-ab89-4c05-95a1-6561fb3c5366/citizen_eco_drive_e870_setting_instructions.pdfIn PDF document text
    • http://dinixebun.epizy.com/nefowiwowesokexikezu.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/82993396065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38692e3a-cd00-4c4c-a86c-605f510bc162/fegikudibew.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/durga_bhavani_god_songs.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_51c6dcdbc77d4a8a9e4b5d740594aed6.pdf?index=trueIn PDF document text
    • http://dilepivulibav.epizy.com/rolukiroguxoxaw.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/83312938106.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F42 5272 bytes
SHA-256: 2897abc722d193a66eea38aff2468466c978581a7d197fdf9c52ec4ff9a8c6a4
font_01_sfnt_off0001212e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212E 10932 bytes
SHA-256: 2484a92063dac1c92629a5a918f53a8eaf1345c69e1e704843cc4ba5ac4adb1b
font_02_sfnt_off000146b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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