Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a980f005ae97b2…

MALICIOUS

PDF

65.6 KB Created: 2020-12-17 00:39:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9d0f3947e128e5527561d513582c213b SHA-1: 60ffb613d15d4e7602d3cf2459f7f4315d198759 SHA-256: b9a980f005ae97b209a8f08cf437e5c2ed32d6005b66a8382cdd793771a0c8f3
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to S3 buckets and a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection as 'Pdf.Phishing.Trojan' suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gettraff.ru/aws?utm_term=ant+man+hd+photo In PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/nalifule-gozivut.pdfIn PDF document text
    • https://vujedivu.weebly.com/uploads/1/3/4/7/134768767/wekibalupoj.pdfIn PDF document text
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/51dd83b134c7d2.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/gurupixabogivaz/45336205966.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/19878665210.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/netikekekiwotabilirerope.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/36951025384.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/adobe_acrobat_2017_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c827d32fb7060d0d779b/t/5fcddeb9260a660a6bfd2601/1607327419347/aesthetic_wallpapers_laptop_pink.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/91314027231.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/twitter_lite_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/47902336923.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/nuposar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1baba2cf09257bd71d527/t/5fc689d861e25426e11baaca/1606846937162/87727016238.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/labowovuxugexele.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/subomegugozofuwesiraxuj.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_off0000b70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB70F 4504 bytes
SHA-256: 33a243dba17680860f506521856b055c3a872e5220bb95d0df8c0bf2af3b887b
font_01_sfnt_off0000c613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC613 11308 bytes
SHA-256: 63cbf399e9c8328ba46aa8ea7cce686b02b875819da760f2ab27dbce02a3033a
font_02_sfnt_off0000eb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB90 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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