Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b7f576fb6ac9d7…

MALICIOUS

PDF

73.1 KB Created: 2021-07-02 08:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5815c719e10be39b914d7c1d9bf936a1 SHA-1: a5d064b02951eec097a312c89f799d0f1cd6231a SHA-256: 06b7f576fb6ac9d72a302297ce96052562c74886278360f522b3b537495b4519
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://smidgel.ru/uplcv?utm_term=have+you+ever+been+lonely+chords PDF link annotation
    • http://c-amc.com/upload/files/dovinenonevor.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c521e7dd11c---tivexuzatuxuxevinad.pdfIn PDF document text
    • http://cga82.com/admin/File/xojulen.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa95a8ccbb---73994694082.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/wukimibogobofiz.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/81741336883.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8901cdce1---netisetatutarab.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/957821863583afcd65d311025605ae2d/22655562198.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/sufoxuzufipudajixafiwe.pdfIn PDF document text
    • http://heizler.hu/files/file/92184504619.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/3u0q1eg1mc46sms0sq8e1acpl0/47345767242.pdfIn PDF document text
    • http://suachuathietbi.com/upload/files/14164567107.pdfIn PDF document text
    • http://aimic.com/userfiles/file/kejafejirusivabakinilow.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/6306629ca0f667f364268d21e8a193f7/64091706067.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/26896897634.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/3506f4effa6f78e117e600a0d3770dea/40813592143.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/puwol.pdfIn PDF document text
    • http://poorclarescork.ie/images/wexinorelileketemov.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d69e1a8d8---70023822406.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094936337585---bedibodarepa.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c5365bac0f086f13afeaf71b901cb9bf/63888826193.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/wibisumokajitulobedas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD241 10688 bytes
SHA-256: 95b582052c5925b0ce8aaba1cae2188dbaced6b47e370f7cfdcef81ecfdd71ac
font_02_sfnt_off0000eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 16804 bytes
SHA-256: dfdf7357f98404da6824766217221c868c348e5a60ffcf8310bd6fc35b0a3701

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