Malicious PDF — malware analysis report

Static analysis result for SHA-256 673d8b41619e0e32…

MALICIOUS

PDF

74.6 KB Created: 2021-03-10 08:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1628a07cc8ad465b1110bcac51c3bb46 SHA-1: 56a73428ac4d6ad0236e151fe153f338960d30a8 SHA-256: 673d8b41619e0e326691ea1fe2c50bf1b6cff3054b8d3ba2d1926c944a2f87e4
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://baarspo.ru/aws?utm_term=emotion+faces+printable+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444630/normal_5fe7f104b4c0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_5fd1630361cb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415525/normal_600166b74102f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426941/normal_603cc9b026126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411503/normal_600d304e77e33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foguduw.epizy.com/categorical_data_vs_numerical_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29bfd6b5-3cc3-40d3-9822-b1fc3bdd34e5/fisher__paykel_spare_parts_sydney.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aecb35e-d295-4dfe-84f5-5b16f5b771cf/pilazetaxojezekidibojufo.pdfIn PDF document text
    • http://rumejumobu.epizy.com/6.0_powerstroke_injector_torque_specs.pdfIn PDF document text
    • http://linakagiwabofa.epizy.com/vatefuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/sherlock_holmes_season_3_subtitles_english.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/dog_sled_saga_apk.pdfIn PDF document text
    • http://zunasolaxugi.epizy.com/nipadekezotan.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/word_template_calendar_october_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db579dde-6a67-4d9c-84a2-094abb5dae34/ernest_hemingway_hills_like_white_elephants_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca15a4c-856e-42ae-b8a1-efba878aa6aa/62536831617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ee0527-d2ca-44fa-ba8a-e772727e470c/gm_diet_success_stories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec9adbf7-4f9e-4f21-bf40-60477fd355b8/what_does_mi_alma_reclama_mean_in_english.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_off0000e77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77A 5256 bytes
SHA-256: faf4e49b9793f2a797bdc67e1cf20d8ad1319257158cbfdebaa554597bfda4ce
font_01_sfnt_off0000f946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF946 10768 bytes
SHA-256: edd9fe7b1c36bab8159201de99887446dc31402fefe6ba391a91679a8b489f48

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