Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfc3713a2ac13f9…

MALICIOUS

PDF

79.3 KB Created: 2021-08-28 19:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e9d167e15a6c9cb4a5f32691448f6e63 SHA-1: 6c0371afb49a12861abf0d1094017d3d8a62a7ea SHA-256: fcfc3713a2ac13f9a88ab07365c4fe7d856b49d83639997f0d302bf69b6fa892
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload storage and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://hzbmsj.net/images/upload/File/58669743467.pdf In PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/gimubaxibikuper.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/f53a077da0bbb937b7e46404d032a714/93817529490.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83a764ff2c---45799828442.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/0op1o6465rfms8arorknttgdi7/26206120428.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/sukedoxavirigonax.pdfIn PDF document text
    • http://iphysiology.ru/upload/pifotodufisebisumova.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/totawiz.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/dataziworijuxejulusof.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c854cfb545d---dapidaz.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/74957695513.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085820fa0d14---82950618519.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/gexosuz.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f59b17a770---7086948626.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/89527822093.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0dc8a4419---wajawinegu.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/91037728203.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/83099248705.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/43562084413.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/69017082368.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/xaketife.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/zisodi.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/ad99054176f1f0f1c6727eaeb3a15c0d/morilujusidudexejif.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c492926bc70---57603258808.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/74518318486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=bloons+td+6+free+apk+no+modPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd3119c689---60899566871.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_off0000cce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE9 10880 bytes
SHA-256: 8e20e5783d9d92950977c9707e55a82e75af9d3405fbd1234cdc23eb5da789d4
font_01_sfnt_off0000e623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE623 18384 bytes
SHA-256: 8c9130d308d56f682232df7ea2180a1ff3bb93b68ebf7fce0fc1c3fe7d4e08f8
font_02_sfnt_off0001162e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1