Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e08c106b9f67fb4…

MALICIOUS

PDF

69.6 KB Created: 2021-09-30 11:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 32dff562e2c7860cd659bc556f3e77cf SHA-1: e9a35598a4a7f102d957e1daa1f15f3c91d711f7 SHA-256: 5e08c106b9f67fb446c5869191485785830b70a960097ba2bc01670f53550ba8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns align with common tactics for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=how+to+see+wireless+password+on+android PDF link annotation
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/fafedd6886e904c4642477eb4b65163b/86462996993.pdfIn PDF document text
    • http://dsfly.com/uploads/files/japovozuwetanejavubo.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/62240071615.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/duzepefagajurijox.pdfIn PDF document text
    • http://skupka54.ru/upload/m/55326697912.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/59351674609.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/89991727612.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/mokavozigexinopifuwol.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/161474f5350f04---kapeva.pdfIn PDF document text
    • http://plantessentialoil.com/upload/files/4059997535.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141277aabbfe---59323556217.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614c856529382---wijizibexewapavokipime.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/8e1477784fcc954428b7c7b2ed9826cd/bubivekufebirulebideteto.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/18850778263.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/gexijelufawukulipimis.pdfIn PDF document text
    • http://deleersnijder-bocaege.be/images/file/jogasufagixilurererakavix.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/fabekemegukesavu.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/kimor.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/rogunivas.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/77977104228.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/77745461201.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/sozigetevo.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/gewotabe.pdfIn PDF document text
    • http://xn--jt2b56wn0ap2a.com/upload/file/202109180433288838.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://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_off0000affe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC815 10460 bytes
SHA-256: 3ac00aa99975caea020fcda40e17c4a56ca3ee9ed6cf52fafc97057050dd027d
font_02_sfnt_off0000dff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF0 16296 bytes
SHA-256: 9b43d49deae4397426babf2497690dc8c02b373ef22bb8f88d2e0d93c7ea40ed