Malicious PDF — malware analysis report

Static analysis result for SHA-256 13be8b1d1ae0f32c…

MALICIOUS

PDF

79.3 KB Created: 2021-03-20 12:00:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0a1bd1c8bd92e0f17281edcb0938664b SHA-1: af5174191b7b82b073f6303e52a8d4e1e07378c8 SHA-256: 13be8b1d1ae0f32c727cf14c83ab24f54acf8c800632627b9ce88d49f835e4f3
186 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 0.9950

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.
  • 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.
  • 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://ponafet.ru/wix?keyword=ne+despartim+si+tare PDF link annotation
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/8898abbe05.pdfIn PDF document text
    • http://daating19.site/is_the_jedi_path_canonrjaxo.pdfIn PDF document text
    • https://wogivanozo.weebly.com/uploads/1/3/4/5/134586267/a99ac330.pdfIn PDF document text
    • https://tixasenuwafoja.weebly.com/uploads/1/3/4/6/134658158/5011298.pdfIn PDF document text
    • http://kapusta.pro/61650970682ygest.pdfIn PDF document text
    • http://erogan-oficial.site/deactivate_voice_assistant_samsung_watchq3pr5.pdfIn PDF document text
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/dapetedumupuvozuta.pdfIn PDF document text
    • https://raxuzorozejataw.weebly.com/uploads/1/3/4/0/134042373/jakidinig_fidos_takuwajevafuvoz_geperi.pdfIn PDF document text
    • https://gilasagajeradek.weebly.com/uploads/1/3/4/6/134632792/7448312.pdfIn PDF document text
    • http://securityverifiedservices.com/wotolapatopuwp3vup.pdfIn PDF document text
    • https://jagefebasedi.weebly.com/uploads/1/3/5/9/135993187/kugorukuvawutu.pdfIn PDF document text
    • http://gratoramaa.space/how_to_use_jbuds_air_true_wireless_earbudssp3os.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/c2a46983-6d68-42f6-a616-8df10c9f6609/principles_of_economics_n_gregory_mankiw_6th_edition.pdfIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_4ce189d48a5f4fccab173943512c4175.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fikuvine/camel_in_action_second_edition_github.pdfIn PDF document text
    • https://104e3d6a-8609-4a5f-ba89-88df40aeb326.filesusr.com/ugd/3cb22f_c0fa365ac74b485bb3fc15bb64d6137e.pdf?index=trueIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_2dbf7535596a4b8aa99e42bcd322b481.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7ff227-427c-42fe-97fb-83d151a984f3/find_the_features_of_a_newspaper_report_ks2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73350f14-f1d7-40d0-b61c-21a4a0644e63/audre_lorde_sister_outsider_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/alternative_questions_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c8a7553-cd94-4c39-a7dc-36b4bc51e1c1/annie_john_full_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0daffa7-bfa4-4e60-bb51-813542a0ce40/52939649155.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/kaxipokigipukejikonorome.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_34a492835afa4812bf9dbfbf5e9dd029.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pujinit/gautam_buddha_images_hd_wallpapers.pdfIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_8a30b6c8d4b4424fa7755ca953852407.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 5044 bytes
SHA-256: e74301b079740116728b59fff32c1cd3e45e063833f6f422f90ab29d9f971d9f
font_01_sfnt_off0000eb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 1928 bytes
SHA-256: 6c3b8cd9c287ccef4b75273e2f97e008c7fbb2c34fcd18f212b8d96eab4f5f76
font_02_sfnt_off0000f458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF458 10840 bytes
SHA-256: cc0c1691d8ca7657611dd98c75ea36958f8d4f0d9631b3299d3f6d8424a78a89
font_03_sfnt_off00011827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11827 16196 bytes
SHA-256: 8f0e4cc40e189f844ba505870c5743bf61ee9cdf6cb8b14e370866b3c0b868e2