Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe60919b5cf9cf3…

MALICIOUS

PDF

104.6 KB Created: 2021-03-20 19:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1ac46d5fd372be63701c8241a2c61454 SHA-1: d954b57bb5d60da797f92a4451ff6d7e14b1ee9c SHA-256: fbe60919b5cf9cf3ed9725dafdace632fa63abf2b92f3e5ffefa5cc8475ab0fd
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains a lure related to 'Ldc answer key pdf utkarsh' and embeds external URIs, including a redirector, suggesting an attempt to lead the user to a malicious download or phishing page. The presence of PDF_SEO_UTM_REDIRECTOR_LINK and SE_DOWNLOAD_BUTTON heuristics indicates a phishing or malware distribution workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/award?keyword=ldc+answer+key+pdf+utkarsh PDF link annotation
    • http://gutagige.sportsontheweb.net/pigul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_604b2d20622eb.pdfIn PDF document text
    • http://rimka.xyz/3898255726d5nfh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393022/normal_5fef423ae1b83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fedf560282fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_6042e78d9fd17.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/4382620614.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412996/normal_5ffbaab0c4ad0.pdfIn PDF document text
    • http://deflecfcvy.best/73469735310m6jqs.pdfIn PDF document text
    • http://ririzobe.medianewsonline.com/instep_bike_trailer_parts_walmart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/91734008106.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/medicare_levy_exemption_2019_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/18470545238.pdfIn PDF document text
    • http://bexexakik.myartsonline.com/38356819817.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/factorization_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/65575825272.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/file_khng_m_c.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/wepugukakiv.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/chrome_os_link.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/adverse_report_meaning_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/10389222739.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/nerajepe.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/descargar_blockchain_wallet_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/who_is_entitled_to_government_maternity_pay.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/arcsight_smart_connector_7._7.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 5408 bytes
SHA-256: a01e9f9d2179e5c831253541aff99328881bacc54241a3bcb4babaa62b67b856
font_01_sfnt_off00011da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off00012904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12904 12744 bytes
SHA-256: 0d9f21b46e8799bcdabffb8b806dd8759cec6df4e44b0a58e51a85d4a28c5653
font_03_sfnt_off0001533b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1533B 16484 bytes
SHA-256: d4f2a698586aa11c10c6279c871f6fa39c4aedbab459d77df965823f7de84e7d
font_04_sfnt_off0001692d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1692D 13292 bytes
SHA-256: 89691176e7869d8101b155297c5ea1233c517a7aafeb03f78266a98ce9b6d234

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