Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0c06f2d0556d1f…

MALICIOUS

PDF

87.6 KB Created: 2021-08-19 04:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 9566eefbb397e366129692aaecffe80f SHA-1: 1b51e9581ebb98b56909b0c8d5195a0fc25326f1 SHA-256: 5c0c06f2d0556d1f727fef4c7c8704f59e88dbc457df6de2716e7ac23463fb06
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://gocep.org/data/userfiles/files/rorivelorugixotowale.pdf In PDF document text
    • http://arohitourandtravels.com/userfiles/file/82070248206.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/ruruvitifupebin.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/45921453987.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/72954613886.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/84064182948.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089308018672---goporigar.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/tagawinemadadebovolikovu.pdfIn PDF document text
    • http://pmmagic.vn/userfiles/file/38529535082.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/c0d848655de2c238b7ef2757945ebea2/weparatas.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/b2f0b60f6685a9f7066cb5cf222395f1/11450355398.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f297d0808---45024746530.pdfIn PDF document text
    • http://homeloanz.net/images/e/file/kenibakeritaxonirafafa.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3b9b42b76---35179910015.pdfIn PDF document text
    • http://elskenecologie.nl/files/jewid.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160fe6c47a7d4b---54464046807.pdfIn PDF document text
    • http://thevenetianmask.com/clients/71561/File/budawojagavumeki.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/13355586019.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/bepibubataponoripexusekuz.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083239eeccb9---12718980475.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/b13bbcaeb54c6adef06bec25983b9f35/65224645019.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/99447603364.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5bcc4lgal11q157c0gdnai2e2/44130024949.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=pc+study+bible+5+free+download+for+macPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC6 4044 bytes
SHA-256: 9704bdc7705624e85b6e0441dd8a5c4a60cd77eec04ba138ac47f298458398eb
font_01_sfnt_off0000ee91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE91 18260 bytes
SHA-256: 82ffd9d0fa6090727c4acf95f0e90839c6cf106d049b99454c3b9d1c11746e00
font_02_sfnt_off00011d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D25 11212 bytes
SHA-256: 7b0fa7c3f2e10720d382367ce17c03d4c54f388dfae6eab3ffcff74771d4294a
font_03_sfnt_off0001377f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1