Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d2e9273010824f…

MALICIOUS

PDF

220.3 KB Created: 2021-06-26 05:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: bca863ded61e6e95b8e81a15168a9fbb SHA-1: 2541142084085c443ecbd3f9649dbcfe8e9adcc1 SHA-256: a2d2e9273010824f4760674ce5b145595234cdb835c2d0fe5e81d739fee1c8a3
206 Risk Score

Malware Insights

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

This PDF file exhibits multiple high-severity heuristics indicating malicious intent, including links to algorithmically generated URLs and compromised WordPress sites used for hosting malicious content. The presence of SEO redirectors suggests a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and linked URLs strongly suggest it's designed to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9467

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://medvor.ru/uplcv?utm_term=fairy+tail+filler+episodes PDF link annotation
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/70982794f2c6e2fe7f2cb86bc4489a8f/54698970721.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/981e924a8c23b666f07aa7a650f4318a/fodifugezabadimijo.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9a4fecb9126dedd47d30976be24f6714/sobatesakepinononi.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5858f1552---wupega.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3555dc1a7---raniposul.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607625c5ede2b---wezixuxewadiwemu.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/39944218324.pdfIn PDF document text
    • http://barnesfamilyre-union.com/clients/52050/File/nuwupofazajaxozanufiwo.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/2b7d258217a5e89d4eed2d18d9d253d1/34269617740.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d302be242f3---sigevetatitaxeziwolosi.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/26c2bf0539d01d87efa300dc0fee9e64/67212629573.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/bogumekapi.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/94823c416266c3bef5498e6708161280/64595981226.pdfIn PDF document text
    • http://cga82.com/admin/File/52836542946.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b824ccca0e---39897760455.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608548831f816---5495454014.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/60516040897.pdfIn PDF document text
    • http://sam-global.info/files/file/68324448533.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/46825530537.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/b11363f25fc01f28199efabdb0b2e76c/kabaweromekoxusarum.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b5baf0854fc---82266346970.pdfIn PDF document text
    • http://www.animefillerlist.com/shows/fairy-tailIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000204f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x204F4 98304 bytes
SHA-256: 34f224af2f3e207211a80bfbbe219b2e0e7a467a5c8b4a981f04e85af451636b
font_01_sfnt_off0003031e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3031E 10476 bytes
SHA-256: c8e16f7daf5172605b2a13303aa75b9b46d928db1338904824a82c336a9ee826
font_02_sfnt_off00031b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0003331c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3331C 19076 bytes
SHA-256: 29d7fb7d5db9d2843702656168af2c9c53140c105ae26ea8d7e116a73e4814ba

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