Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4798447178f578…

MALICIOUS

PDF

88.9 KB Created: 2021-06-30 23:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b33312d05652b1d6148ebe88f203b2b6 SHA-1: 99b411e2be5b7a929639a2721b1c2df790c79031 SHA-256: bd4798447178f578a4dfff26a2cf83e278fbaea3770405bd6e5e8e19caab34dc
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The document exhibits characteristics of an advance-fee scam, presenting lures related to lotteries, prizes, or parcel deliveries. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://synerhu.ru/uplcv?utm_term=online+free+pdf+text+editor
    • http://strandedtattoo.net/file/babazikijoduveroxaful.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/01d32d2a6a3ca2f5025e012fbd30d6b2/28727338286.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/2fekmbqmegkpsvo90br8s2p6ci/rekuvuzudazubowowibid.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23b223d54e---4030761198.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/l2na1l5svoalgpdi3g50b88gnb/vozotexugutiped.pdf
    • http://www.mustwalge.ee/data/content/files/22621323924.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/eef5323627192983e789716c60892020/51819651190.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d780edc37bd---tokujo.pdf
    • http://nelly-design.ru/upload/files/wodokofujogolekotosumag.pdf
    • https://photojet.bg/userfiles/file/najonuruvazakedalinidos.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/1babe5abf4260e6adb9dd4cd3eed9d26/nipopi.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/v25tg3thvpqe9trd68jtgr285c/gedadefemabora.pdf
    • http://allamericannursing.com/userfiles/file/rogufabizajulovet.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/04b5955596dfbde7429e551d0aa8bc7a/kumigalijopopowebelepusoj.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/1dkd1viooaf94bgrpm3o5obuot/69104424059.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608eef7fc5f49---53282625567.pdf
    • http://bajajsports.com/userfiles/file/zexisilejokud.pdf
    • http://thesetnews.com/images/fckeditor/file/69561970979.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609039bcc1cad---9174060198.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b36cfe9cef---42107274852.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/88b182012a3d978427973fa29f12aa01/1076564602.pdf
    • http://cn-polylysine.com/d/files/44969946869.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f94c.bin
b0e55121ef17ae9bb19bf5d97c192908d20bd4089d9eb713bac51736e89564ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 10288 bytes
font_01_sfnt_off0001108b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1108B 16792 bytes
font_02_sfnt_off0001289d.bin
cfb74d24cb344035140ca56e68b47e13d65c16c9ce5f7222139bf976a9a70bce
pdf-font-stream PDF embedded font (sfnt) at offset 0x1289D 17456 bytes