Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f06630afdbb7f4…

MALICIOUS

PDF

85.4 KB Created: 2021-07-05 16:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3e86907ad5ba9c7336537850af3f63d2 SHA-1: 07a7949cbb71b671e618760cd3bbd982d4a67cad SHA-256: 22f06630afdbb7f4a5f18301493e2d081168ff9dca33854bd1e11205872cc018
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised CMS upload directories and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of numerous external URIs suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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 https://catamma.ru/uplcv?utm_term=bacon+bbq+chicken+loaf PDF link annotation
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608926dad8399---rabajevot.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160712f050aefb---75670989571.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/1401521634.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943f8b478f9---xejulevi.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/80277943976.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb25ead1a4---52297950382.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607576773716f---99437448591.pdfIn PDF document text
    • http://myphamasia.net/upload/files/tosonadetitoj.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/bd9054b8abbb0f1347f24aaba7881af3/zelares.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f14ddb6812---38430717198.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/9c66fed4fe9b1df39f16b8fee3e4973d/pubureni.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/4713790897.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1c14d6857---dofowu.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/39748101581.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/a2948495c92f6b02b9a25b600df8b8bb/97738525391.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/93arjd8fkcbu82u3sip76g4r0u/82571632973.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0c974687c---23369313747.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/64132468600.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/81116350120.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/tonejuwif.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eabda63b01---bawodaxiropisadirizo.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/6130994959.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/13362496646.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/vuxatux.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA24 2164 bytes
SHA-256: 52667aeab6e097d910c001fda5f9f8a9b5e3ba1c812efd5ca96664b8c12b6537
font_01_sfnt_off0000d3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D4 16684 bytes
SHA-256: 5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d
font_02_sfnt_off0000eb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 10496 bytes
SHA-256: 848127f8d3f592c4c57b77c60be54060e56249811c9e3240980b91aa03b7447e
font_04_sfnt_off00011b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B50 17044 bytes
SHA-256: 96265e481eb30c9b55ed44c3cb0feb5904d0de31b74299fcd8b612728308f1eb

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