Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcd74017a99fbec…

MALICIOUS

PDF

71.4 KB Created: 2021-03-18 23:13:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4834afd99d6f41605397c7315480645e SHA-1: dd7bd44ea1ca9810cb62dd11a1eb7af097f7586e SHA-256: 2bcd74017a99fbec26a7570284ca665b9974655046b32f1ee1d5be0a55f09807
136 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-severity rule indicating an image lure linking to an SEO redirector for phishing. The ML classifier and ClamAV also identified it as malicious. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt.

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://zajinet.ru/award?keyword=metoprolol+nursing+implications+davis+pdf PDF link annotation
    • http://gitilapen.66ghz.com/pasulesiwepobigiguxi.pdfIn PDF document text
    • http://neliwiveles.22web.org/87751675779.pdfIn PDF document text
    • http://mysteps.online/696087244865rdyz.pdfIn PDF document text
    • http://fsfsfd.xyz/muwugitasipugasi8y3n.pdfIn PDF document text
    • http://fatiberekizibu.iblogger.org/acknowledgement_internship_report_sample.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/zonivezada/archery_3d_model_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/kathi_mela_kathi_song_isaimini.pdfIn PDF document text
    • https://5f90d536-2a72-4461-adff-280afd3056cb.filesusr.com/ugd/27c394_2424a363818549b083712af81e269f5f.pdf?index=trueIn PDF document text
    • http://rokanuvikokesa.epizy.com/15226806820.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/tizofupetitixomemarevinu.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/kimijaramegadumujineles.pdfIn PDF document text
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_1db3c0b822e749e2ad877baed8776f67.pdf?index=trueIn PDF document text
    • http://lirinuguwe.rf.gd/avent_bottle_sterilizer_how_much_water.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/59924142234.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/91245339758.pdfIn PDF document text
    • http://tezadoni.rf.gd/africa_physical_features_map.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/advertising_medium.pdfIn PDF document text
    • http://nusazonawo.epizy.com/duripotunekuwexulomazuz.pdfIn PDF document text
    • http://rojavaluji.rf.gd/addition_and_subtraction_of_algebraic_expressions_worksheets.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_off0000d555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD555 5540 bytes
SHA-256: 316f3c88099f07b2e98a82419cdb80f29ac36c2ed3e08b872946095418fb3825
font_01_sfnt_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 11160 bytes
SHA-256: f59b0c86ec116f70dc27ab3b5f48bfdb073d49d82b98ba7c494d1a077f5e676e

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