Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e29485e551b0981…

MALICIOUS

PDF

106.4 KB Created: 2021-07-23 13:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ced2747357b11c4bf33e5c7deb971ce8 SHA-1: 65272a2285f71de6b0c983c739f7530275014a39 SHA-256: 1e29485e551b0981f9ec33441380aab7394411aef67d99c1d56dbdee969ea627
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. The primary attack pattern involves tricking users into clicking these links, which likely lead to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://orderkiwicafe.com/uploads/files/47106453001.pdf In PDF document text
    • http://iuf.kr/pds_down/files/18731385285.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/74999488399.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160818d5d2cc7b---10272324058.pdfIn PDF document text
    • http://facades-et-traditions.com/actualites/file/falizotolizerozegadalow.pdfIn PDF document text
    • https://airshow-bg.com/file/bafubizevasif.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3e3001384---xebupuwa.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160749f837aacd---52630947485.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16080c3acc52ac---vimuxomisibumawetonodojuk.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/6db0ce40b5d7f691d8ce8e568a54be53/jijujafaromejo.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a591f1b0897---wakodiradujuwudezomaw.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/303ac40947a2fe40024e648ba6a34f0d/takipepozebiwam.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6714c3c909---5175078574.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fb0f4e646---foranepajitanizudekoget.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/gulusanuxujis.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/af848e9675f508f88758485626582b22/68325934483.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/26717221367.pdfIn PDF document text
    • http://artside.org/data/temp/file/betewebarimusom.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/91123694823.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a56f254eeb---91782888761.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc78a86b98---2309054666.pdfIn PDF document text
    • https://shidoremicrosys.com/media/nurimozanobezusotasojegun.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6e2178646---dekileronoluxakeka.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/kubapiwotemosulijop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=southern+heritage+realty+clinton+ncPDF 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
font_00_sfnt_off00013d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8D 17232 bytes
SHA-256: 4143f9a4523635259ea3b5e441644130d2308c31a5618ed0535ca28e623cf648
font_01_sfnt_off00016ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ACE 10632 bytes
SHA-256: 738f6a99f8e6235b7fa23bc435c284ae27e3b89a7ae708f072947dc9d51287c3
font_02_sfnt_off00018325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18325 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1