Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f647be038c4676c…

MALICIOUS

PDF

81.6 KB Created: 2021-03-04 22:52:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b29820d1dbf6da2c3c27788a71e5ec70 SHA-1: 3cbd483527ff4361715051f4471bda162cdce7a2 SHA-256: 5f647be038c4676cb2dd7d1add42ad3155bcb4e8c40aef5219281dcf528cd08c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://zajinet.ru/aws?utm_term=ted+baker+carry+on+luggage+sale PDF link annotation
    • https://cdn.sqhk.co/nibijegun/diaHT1H/modixizozonakuzonixiwufo.pdfIn PDF document text
    • http://flylovel.com/10581300074okyl2.pdfIn PDF document text
    • https://valazasabo.weebly.com/uploads/1/3/1/3/131398294/6b03169122087b.pdfIn PDF document text
    • https://pesuzipowezav.weebly.com/uploads/1/3/1/6/131636843/nirorutobez.pdfIn PDF document text
    • https://cdn.sqhk.co/bajowekununa/zvujaha/virus_buster_dr_mario.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/52dff.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/kawuzauvrwc.pdfIn PDF document text
    • https://cdn.sqhk.co/buzosefif/jPggbgj/82535396069.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/viiN7hd/toddler_words_starting_with_d.pdfIn PDF document text
    • https://cdn.sqhk.co/tadeketoxab/dzXP6SJ/nukidasiroropemew.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/radubozufiwo/talobebozigunizize.pdfIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_60402c0eea85479ba3bf803d29129d06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisik/71742494124.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/43597985597.pdfIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_595ea52cdbcc436d8fa8633a9af5a227.pdf?index=trueIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_11be2d9221db410b8da6213589c40412.pdf?index=trueIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_627a411b09c84b4288af387f4924a715.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_2c204e9cfcbf4f06b8a7d65de906cc60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/79551718145.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_8750af35ada24dccb7cb900907dc4c63.pdf?index=trueIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_829e182de1f746d88e31dde9a3ec235a.pdf?index=trueIn PDF document text
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_834fbc3659b04210926ea8bdfb86909f.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_off0001016b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016B 5364 bytes
SHA-256: 1840f3153c590236c7a08fb5811eaf021956003f4ce90dc336b174f9c1d24dc3
font_01_sfnt_off000113be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BE 11060 bytes
SHA-256: 6edacb2ccedd9bad838a13dc37d459e09463c1eb75d1d72907198bc345bdd358

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