Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f58ca5f25861d80…

MALICIOUS

PDF

114.9 KB Created: 2021-08-05 01:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 75ed8e72ff778c2c81dbd1211bde754a SHA-1: 61cd397309252b5ad7b5e296e6addb7f5c77a61b SHA-256: 6f58ca5f25861d80d2d547e0d719850ef101794b50f486b0c6089965f60882b0
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a link farm used to host or distribute malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/uplcv?utm_term=what+is+code+of+ethics+in+early+childhood+education PDF link annotation
    • https://all-stage-meditation.tw/uploads/files/60f3bcdc2ae86.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/44272318158.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608628d5eee95---21782779184.pdfIn PDF document text
    • http://vp-dmsh.ru/admin/ckfinder/userfiles/files/vapusit.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/nutumaz.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d222c0ada2---86538613898.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f3c842e56---39702381232.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210626124506499.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848989bfcec---mijebopekex.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8edcc996c0---91563337692.pdfIn PDF document text
    • https://aashianarealty.com/file/8689943256.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/ladebekiruwa.pdfIn PDF document text
    • https://qnzar.com/files/femoba.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/fonaned.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/75543997020.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/gafexuses.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021072505534773499.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/6cd9ec7a1d06f13e3f655a4017d0402a/wasiwinodavegavow.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/83173358457.pdfIn PDF document text
    • https://amblamy.ee/upload/file/75648857046.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/gakalebovifarojuvawipam.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/45139798139.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ce6808603---98130897135.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/lopogevakulunadodinavuli.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_off00015f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F8E 17168 bytes
SHA-256: aca756b220e0a178da16b2083a134a26aad79c2a1292d28223e53d7b2c62f66b
font_01_sfnt_off00018b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A37F 10780 bytes
SHA-256: bfef232bc0313b51f50bcd459c1fec48606b9ffe5873a6236c4bcaecbb21cf51

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