Malicious PDF — malware analysis report

Static analysis result for SHA-256 009b2ae209f9f43b…

MALICIOUS

PDF

277.4 KB Created: 2021-03-29 16:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: aa177db0fb8d479fd653c0f9d3064d04 SHA-1: c6f255e4c86be00abf2282e19048baa590e4a386 SHA-256: 009b2ae209f9f43ba4b424536e84791d4b5b39228eb669f27e828738dc05ed51
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a high-confidence heuristic firing for a redirector link, specifically pointing to 'https://bologen.ru/wix?keyword=dna+vocabulary+worksheet'. This indicates the document's primary purpose is to redirect the user to a potentially malicious website. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/wix?keyword=dna+vocabulary+worksheet PDF link annotation
    • https://cdn.sqhk.co/lekabewoz/1tZgibc/pes_club_manager_mod_apk_2._3._21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413111/normal_5ffe1c24dcb9c.pdfIn PDF document text
    • https://cdn.sqhk.co/razonavari/idMMLKX/bollywood_party_song_2019_mp3_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5fe9848a21d9b.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/gfhJheP/guess_telugu_movie_names_whatsapp_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_6059615aad22b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_601a8548426e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408593/normal_601c944b1e61c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454681/normal_5fe21b588b1f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427086/normal_60541a69d59a2.pdfIn PDF document text
    • http://ragofilud.medianewsonline.com/nijugekoxeziraronufotif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377100/normal_5fee403ae134d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499329/normal_6047dd1ae727e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447877/normal_5ff26ec5e1b4a.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/a8d1479b-ff2a-4c62-acc6-3562005c5218/dunitukugetasavivirovexa.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/beautiful_flower_images_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947187da-48f8-4b21-8d06-a744fb3cf3d3/lujemimorizuvetafozorubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/393a40fb-dc02-4476-9ac1-31f0a043c2de/52953450558.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/sap_online_tutorial_video.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/mathematics_for_economics_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/kivusabufaxigidat.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/17072602090.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_off000410ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x410ED 5344 bytes
SHA-256: 0a03b2aaf4393f69a99a2c17ae95d399e298253a82f57f64222af70f912e817c
font_01_sfnt_off00042332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42332 10376 bytes
SHA-256: 8d665d9e5ecce262b51ad5cb026ce6a8655c2989ab7c6086f0f181dd8da8c688