Malicious PDF — malware analysis report

Static analysis result for SHA-256 b13657fe0187accd…

MALICIOUS

PDF

59.7 KB Created: 2021-03-24 04:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 585465955818222eb58c6d56abea5501 SHA-1: f07bd2d83ce98f478638379abb437476c2ea98ee SHA-256: b13657fe0187accd2da0f735292d2a6f5c8741b42c480135bae1c421f9c8dfb0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and contains an external URI pointing to a suspicious domain. The document body, though heavily obfuscated, contains text related to search terms, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of external links and the nature of the heuristics indicate a likely attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6927

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/award?keyword=islamic+calendar+1440+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378836/normal_5ffb20cd77b7d.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/example_of_application_letter_for_teacher.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/etiologi_atonia_uteri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_5ffde3005ae5b.pdfIn PDF document text
    • https://cdn.sqhk.co/xisofofumew/jgchjjg/19838770217.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/8hiKDnv/space_engineers_hydrogen_engine_rover.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_6034ce9d3b8a8.pdfIn PDF document text
    • https://cdn.sqhk.co/sesudegaruta/egja4hi/jopotaxunesisepas.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/role_of_buchholz_relay_in_transformer.pdfIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_ae175e47b9ff4095bdcc2691b57b7453.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/picsart_photo_editor_apk_full.pdfIn PDF document text
    • http://givetupazowo.onlinewebshop.net/gazasogir.pdfIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_7e923dc9cf65423f9dae1d403f95eac1.pdf?index=trueIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_fb09d0d7c5f7473487023eb95e32f86a.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_4f5840bdabbb40838a8e8e9c859b92f6.pdf?index=trueIn PDF document text
    • http://pupagerirawax.myartsonline.com/american_english_file_2_teacher_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/17353622431.pdfIn PDF document text
    • https://da25564d-e3c2-4b9b-87ba-dd8ce2ae78d4.filesusr.com/ugd/c82cd6_4c07a83ba7d24882bd26667db9c38088.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/getizar/32101904338.pdfIn PDF document text