Malicious PDF — malware analysis report

Static analysis result for SHA-256 f615fed655bd1248…

MALICIOUS

PDF

70.2 KB Created: 2021-09-05 05:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 27643b7618dae8ff5dded85acba11bff SHA-1: 594ad7d4d2828ac7f4bd7cf771667846924bacf0 SHA-256: f615fed655bd124867274879fd5fafe2e456cc4a114e8cdc593714a20495323e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious document designed to redirect users to harmful content.

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 https://krisoc.ru/uplcv?utm_term=hamlet+story+in+bengali+pdf PDF link annotation
    • http://ashioke.com/images/library/File/23333187275.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/71766514078.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/ffffcb441d0bba043bb7129f4d4c3992/zorulabinaxixedugan.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c99abacb84---kobixipovej.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d43b6dddf47---48312548532.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/66202706425.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/80145118526.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a483932d1---xigewepewe.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/vuwefegagonixezu.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/13943341408.pdfIn PDF document text
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/30022347063.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/moxuwugubifakosiso.pdfIn PDF document text
    • http://samtekelektrik.com/files/42164431215.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/dojizis.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/53441805284.pdfIn PDF document text
    • https://papiratisk.cz/soubory/13240027035.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/4c5e34c7e1299aa5b3638b13d1f18ec4/fivupuxum.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/7d224c95f05e11f8d07a153127e80566/89624852916.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/sbe6dj32oj6q1lfajhjd8e9uc6/57841225226.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/223ammalsd67ds7krgic8doe94/84057849292.pdfIn PDF document text
    • http://pincesorvarshop.hu/editor_up/15250313755.pdfIn PDF document text
    • http://georgefamilyreunion.org/clients/86186/File/91859689728.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_off0000b090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB090 15824 bytes
SHA-256: ef1b6759ec291e57275268d87ed4075b5a570d3aac6340fa9fe83bd1a4b2dbb9
font_01_sfnt_off0000d7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E5 11084 bytes
SHA-256: e7cdad1117876e4aa44bf1b35bb4d9539f7f14bad4092949035d37e8d8151ec7
font_02_sfnt_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.