Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01d0cd150e38ba5…

MALICIOUS

PDF

79.3 KB Created: 2021-09-04 22:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d2b8dad2a43b2a74621297b4f4a89aaa SHA-1: 77484a7cfe2b2436c206fc208e12f74c0a166d18 SHA-256: f01d0cd150e38ba5051b2cd92e294baf81248d20566ceb229a6712132834f76c
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting it's designed to redirect users to malicious content. The presence of external URIs and the nature of the link farm indicate a likely phishing or malware distribution attempt, potentially leveraging a PDF exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nissanzorba.ro/ckeditor/ckfinder/userfiles/files/dewanalajosulujajilel.pdf In PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089b39c1a00b---43543533178.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/kuzudujamenusedizaz.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/2418b76f74f8536a0e26b5f69dc0338b/forabuw.pdfIn PDF document text
    • http://asustainable.com/global/file/58567986847.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/joxakazepizonodolaw.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0d947dcab---25677279651.pdfIn PDF document text
    • http://finvestfortune.com/admin/userfiles/files/putawetanekaxigekozuw.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/76008330426.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/6ea73956a9c0d646439cad8c3a75193c/luxoritatajoriwi.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/5cc28dc8c38e4219f725362f0f9c7095/88812600338.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/4783760111.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/41bcdb12372e29bb19296323c4e11815/46641305050.pdfIn PDF document text
    • https://patc.fr/imagesfile/55193623855.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/83076174635.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/roxujalipalazukatipa.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611c499848a9a---bevesinozanam.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/denuxusidizufib.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5bb722db7---vakafefitosalenoj.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/mejojobi.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/b2ca5da8b621b938c544d31686eb8001/wifubadubadabuzijodaxele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=toefl+speaking+question+2+topics+with+answers+pdfPDF link annotation
    • 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_off0000cfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BC 11404 bytes
SHA-256: 66d7b2d4647f7fa2059bf795668a30982b6604442ec24d925a3191fb8c2123ad
font_02_sfnt_off0001023f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 17324 bytes
SHA-256: 3788ed8a21f5c02e62b4e62f9a67564c2aa8b279dc4a51edfc5bc92b63c38de1

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