Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3cc0f142f4a76a6…

MALICIOUS

PDF

73.1 KB Created: 2021-02-25 22:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: fe3d998597d810688d66e69cc8bab76b SHA-1: 460bfcd7ec22e5f0f9536daa5181a421a54b0ece SHA-256: b3cc0f142f4a76a669283dfb64ff2afc1f3cb047d55b2c9cef414f37d84b44da
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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.
  • 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://crophysi.ru/award?keyword=oster+turbo+convection+oven+instruction+manual In PDF document text
    • http://poradoit1.site/notarized_authorization_signature_form7qifi.pdfIn PDF document text
    • https://zaketedojerobi.weebly.com/uploads/1/3/6/0/136023974/a983505e2a6bbdf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474759/normal_5ffe1b76a9f7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481552/normal_5fca58e8d076f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530910/normal_5fd66e054ff57.pdfIn PDF document text
    • https://fumadutukit.weebly.com/uploads/1/3/1/4/131437402/6aad254b2.pdfIn PDF document text
    • https://bozaxemavokasum.weebly.com/uploads/1/3/1/3/131383719/tulisoxip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449000/normal_5fdae9b48d50e.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/12664886023.pdfIn PDF document text
    • https://rijadotijijani.weebly.com/uploads/1/3/4/4/134470018/18360ef4.pdfIn PDF document text
    • http://wirelessinfo.ru/wibumoxodunebazepafuwopb87b.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/buvomiwoxojajalaxedegudi.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/who_won_the_columbus_blue_jackets_hockey_game9lvvh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_6023f65ce1882.pdfIn PDF document text
    • https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/nevazali.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/vuzotisenixava/free_online_numerical_reasoning_test_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/sovexuvotomi.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/survival_food_candy_bars.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/embedded_stylesheet_in_css.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/cc308_camera_detector.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_off0000dfd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD0 5172 bytes
SHA-256: 2021d685deb5f36c382c14717c3cecfc3dcca478e64ff82c21323343a782bc3c
font_01_sfnt_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 10864 bytes
SHA-256: aa0a1681ff005e0b98979b91c741346b0c6c27ea3f9db816cc1a796e252ead3c

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