Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d997c6b40091f5…

MALICIOUS

PDF

81.7 KB Created: 2021-05-08 04:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3aecea494371aed5a9dbf6868146a7e0 SHA-1: dc8d7702750e3ad1b2e8765fc69eff17c7d7358f SHA-256: 32d997c6b40091f553e377ae8d05b9a9242e8b24a5abdd10bcf3d7a76dee9957
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-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.
  • 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://nipisod.ru/strik?utm_term=does+walmart+have+gluten+free+food PDF link annotation
    • http://toteganutiv.66ghz.com/montgomery_county_md_food_stamps_income_guidelines.pdfIn PDF document text
    • http://zajegipu.22web.org/accounting_conventions_with_examples.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/how_long_does_it_take_to_become_a_vet_tech_in_florida.pdfIn PDF document text
    • http://gosunenibunale.getenjoyment.net/mini_international_neuropsychiatric_interview_franais.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_177c3a205bcc45faae7649810983fc72.pdf?index=trueIn PDF document text
    • https://b0b8c8c5-0de0-49ea-8337-0a56b8a4e65f.filesusr.com/ugd/bf9dfc_c7f8a1f5f32d4ee499394b5283ec7b05.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/46233002334.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/what_starbucks_drinks_have_no_coffee.pdfIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_3a3abb4ac6714fb79aee7442bb9b04ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/88820648104.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/sc_caste_list_in_rajasthan.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/760_pumpmaster_how_many_pumps.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/pearson_myaccountinglab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/astrology_answers_virgo_horoscope_for_today.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/criminal_damage_law_reform.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/nujevenaletibewodedigug.pdfIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_14f29f97f76f49c5a69f58ab972b491c.pdf?index=trueIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_bd4c1d42410f4376b3115015eae23c20.pdf?index=trueIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_4ca997d60944492aa7978343d69647cc.pdf?index=trueIn PDF document text
    • https://dc5ca969-d333-4582-9879-b719aca70d73.filesusr.com/ugd/760c43_a48ae313aadf4c3c9e935fd31eebed77.pdf?index=trueIn PDF document text
    • http://mabezaze.epizy.com/mukavotojodemu.pdfIn PDF document text
    • http://poresiz.epizy.com/asientos_contables_ejercicios_resueltos_argentina.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_off000100fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FA 5472 bytes
SHA-256: 3c125333bd3fdada94385fb2ca7d58c628b168ad17ba244fee3d9db304c6aef0
font_01_sfnt_off00011386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11386 11312 bytes
SHA-256: da96549c2a377f6e2b0a1a5c8ba0f50610c5245fc381aee243cbf928f68aa88c

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