Malicious PDF — malware analysis report

Static analysis result for SHA-256 324ee6a9b761a715…

MALICIOUS

PDF

85.8 KB Created: 2021-07-27 01:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b3fc078dacea0ffa449a9ef15718b3bc SHA-1: da1b7f5430fcfd6f9834699968e1ec9e552959b6 SHA-256: 324ee6a9b761a71576b90114a3bf641ee6dfa39f1c97d6582fb4268e9ec34e12
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites and other potentially malicious domains. The document body was unreadable, but the presence of numerous embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fff9ad9d7b---bararoxevemam.pdf In PDF document text
    • http://bawaconstructions.com/editorData/file/45442124605.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b8dd3c872e7---6412515199.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/ts0r6kf8avv498id8d5qqt4lv6/zajanufeka.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/45397154837.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/kamazapuvosekugudakobiz.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160987e5a0412a---zonepiretejiri.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/vuwewiribepubuwep.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/22270610164.pdfIn PDF document text
    • https://okazionche.com/files/zesogogigomane.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/43223312790.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/24489347101.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/15150148884.pdfIn PDF document text
    • http://accronline.com/userfiles/file/rovijogamowewos.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/86591648725.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/47538020115.pdfIn PDF document text
    • http://svx.su/ffile/file/90686005587.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/46e3abaa8c85ccba075f665b7154eb54/77103375208.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/16863518cb01bf1e96fcc801b406aee4/sevezu.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607765c6762c0---11052295588.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609408267e649---lukakaruvadunamudimul.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b418e60a4---7909691962.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/99f9f9c5cfd39266ea32ae8bbe71a74d/20232334961.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/baebe4473f8a407ce312a399a01b5865/54820881545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=en+10204+type+3.1+equivalent+materialPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012d42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12D42 11144 bytes
SHA-256: 125b24d0ab83661bc2f21f92a2eca205e02466049740da4123426b422a1e93e5
font_00_sfnt_off0000e955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE955 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10167 16924 bytes
SHA-256: 6f4d4473a4ed5719e65f61eee3d0d769b5ca3b9816386d008375317c864ee47c

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