Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0f64955a9a0262…

MALICIOUS

PDF

97.0 KB Created: 2021-02-13 21:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 0d187f9c03d1dc8d11e3fee934f7b06e SHA-1: 3eb9d05cf6b4e70cec972dabdc9e5e4c53d20012 SHA-256: da0f64955a9a0262a710717d694a043e3750f27584a3c132d0d11c39db04e899
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' suggests the document uses an image lure to redirect users to a URL disguised as a free download for educational content. The embedded URL, https://bologen.ru/aws?utm_term=mastering+biology+answers+chapter+5, likely serves as the initial point of contact for this phishing scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/aws?utm_term=mastering+biology+answers+chapter+5 PDF link annotation
    • http://polikarmonolit.ru/aadhar_card_update_mobile_number_form_onlineyjp8j.pdfIn PDF document text
    • http://forkidsshop.online/modern_warfare_3_prestige_hackhiya7.pdfIn PDF document text
    • http://ziwavabewite.66ghz.com/autodesk_inventor_error.pdfIn PDF document text
    • http://neyroskakalka.site/14167844422ygb7m.pdfIn PDF document text
    • http://itslm.fun/bullying_causas_y_consecuenciasvp56a.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/63966228302b8t95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://delifas.epizy.com/mefel.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/bedsheets_online_shopping_india.pdfIn PDF document text
    • http://bunebuka.rf.gd/21998976008.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/97155183827.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/losing_my_mind_sondheim_sheet_music.pdfIn PDF document text
    • http://jizubirusetidi.rf.gd/quickbooks_legal_invoice_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/95615312633.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/90378507604.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/pujamelonasigaje.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/kidufakoti.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/zarudodezepu.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/11047071798.pdfIn PDF document text
    • http://xelilurezo.epizy.com/whatsapp_plus_new_version_free.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7F 5660 bytes
SHA-256: 64c97a60fb7c99b9463b868ddddef8b4ead866e484aeb8e1b5c37c5e90bb2557
font_01_sfnt_off00014dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DEA 11852 bytes
SHA-256: 808320fd068af5fc90a4c176f9f87ff04fc1778639b985928395cbf0702199f3

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