Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a62096b067a306…

MALICIOUS

PDF

87.6 KB Created: 2021-07-25 12:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fc34308d1a2e0b4283d293182c82f62e SHA-1: dea8c64ccff34bd0c8c0c1d4f669a1602103adde SHA-256: 17a62096b067a30670add8273db32e9676e31e45d3f87ab1d03eb2b6c8f492ff
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and a link farm indicates a likely spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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 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://broadmoor80.com/clients/866172/File/32249940840.pdf In PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/115a11pod9lm2q976iuuofgise/49916123950.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/acedsd4vuh7ar4mgaldbjl05u6/wisivasofejipozotipema.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qfhmg2jvdfo3ouiiq9ki41inv3/vutorabosilowaloz.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/49242945892.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/sekukikigunok.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607139b70d8ae---xefoda.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/keup7kurhmrchlcj9jqfis6b6c/puroponakil.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/guwubapi.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6622352d1---6171983523.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/gatoberu.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/e392bcc321b0be2f6460dd5db2ca0bb8/gokapodosako.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/87398930401.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16079c3a4321b2---66708392800.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c89668d90d4---zidumoxivevalebutoxatamov.pdfIn PDF document text
    • https://baongochoa.com/upload/file/lipujexoxelitara.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/62221478650.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/8995486223.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/856da572542ca0a14f8b047fc443543a/worojax.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/semedexeriranunekurafun.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/39829263697.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edf185bc75---vowozajovejuwuvuxelori.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/30074952903.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/nidag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+reset+frigidaire+refrigerator+after+power+outagePDF 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_off0000f3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B1 10700 bytes
SHA-256: f94c6967b05ee3d046282ae770aab2a1a06061aee4989f145b4d413e8526c1c9
font_01_sfnt_off00010c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001244f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244F 16808 bytes
SHA-256: c5c17bba7b85640bfd8b73ac2914f11c4e00dd1133f91123d5932f0f1e1debf7