Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de9decef349e316…

MALICIOUS

PDF

74.8 KB Created: 2021-04-08 20:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ab13fa1505f44e90b04daf7104a48521 SHA-1: c0727e0bb1fe1bea753e50ae01efd76473befa7d SHA-256: 5de9decef349e31649de16ff55e278114fc9cb644dc55c9ed2a92a69aa122861
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is a PDF document detected as a phishing trojan by ClamAV and a machine learning model. It contains an embedded URL that redirects to a domain associated with phishing, likely intended to lure users into downloading further malicious content or revealing sensitive information. The document body, though heavily obfuscated, appears to contain keywords related to the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xezojetit.ru/strik?utm_term=ruud+silhouette+gas+furnace+limit+switch PDF link annotation
    • http://natur-green.fun/forget_you_glee_piano_sheet_musicwgymw.pdfIn PDF document text
    • http://santand-es.com/metedobuvesajsqo9.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/suxij.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/beep_test_score_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/eIiedHJ/73140724847.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/tom_clancys_rainbow_six_siege_guide.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/84_hatha_yoga_asanas.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/lE1ghGI/ikea_brimnes_dresser_canada.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/malukitaligemabefegamevo.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/migrZJw/color_picker_tool_in_photoshop_cc.pdfIn PDF document text
    • http://sayfelengs.space/2005_honda_odyssey_code_error_eg1ojv.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/fotepopunaj/53859852928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb1157d-18a5-4a91-9815-51411eea50b6/what_is_universal_quantification_in_logic.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/11783546358.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/company_introduction_letter_for_new_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e7fb4a-69ea-4ac7-b1de-247928433863/twentieth_century_harmony_by_vincent_persichetti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9baef1dd-059e-4f36-9734-13b38c09eaf2/how_to_tie_double_hook_fishing_knots.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/juwoxa.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 6

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_off0000e48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48B 5532 bytes
SHA-256: 5f0dc95072c8fd2d3fba8e5fc8cfa69b59aacfe7bb53afdeda27d0113dca8038
font_01_sfnt_off0000f74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74D 10864 bytes
SHA-256: bc55a134a9e98c692836d69698ac6ea3fb9c1a1e48cc9ec735c8d4a8f8c32f3e

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