Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c85c3c80f0ddf85…

MALICIOUS

PDF

99.6 KB Created: 2021-07-10 02:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fae32da76464cf713edaef0b2b7157c3 SHA-1: 7bfddd1ebbc9c807ba496df91de66a11345e1c0f SHA-256: 6c85c3c80f0ddf8538d1a5b94795b6d8fce789c663cab5295ae82b90662d0c09
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised CMS upload storage, suggesting it is designed to trick users into downloading further malicious content. The presence of embedded URLs and the 'download button' heuristic further support this phishing and malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/a614d31b9ccdca33c0559659501d26d7/63062194967.pdf In PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/potebodufewutudi.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/6prtusr3k0556l03rnn1q0iqdt/vukafododul.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/2d519371a9a0557bc929227ed30281d4/kinevuwoxeludufuripadawuz.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/70431538638.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/12440741689.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/95641486385.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/54892005311.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/99352419198.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/7aoiem7ndjpkvr3l032hiv2sp0/loziviv.pdfIn PDF document text
    • https://hse.tw/upload/file/patapesogeva.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/lafuni.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/nirijegipugizesolu.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6578d0935---zazidovadiwejotukuzigi.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/57072gv88skc35n5gfl5hesf7d/zuwed.pdfIn PDF document text
    • http://suttonoakfarms.com/clients/880813/File/80632993434.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/95e8ad9d1aa34f219f26a774ae9b94b7/jebaxovigujidukefaku.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f3080faba---lebulupawejotebofena.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/8103d17ae43b10ebc56521a30e47ac32/kuzororelemuzufuxaxexav.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26d289d293---laduwajodotusetivazedesa.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/85042529677.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c5f06c415---56084321205.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607040798da05---sowivododofisesuwoj.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef6581ae48---wanalerovanu.pdfIn PDF document text
    • http://lhs75.com/clients/46937/File/somofifux.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98a8a3a0d0---redubogutatarizokuzewar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=fast+3ds+emulator+for+androidPDF 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

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_off00011eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEC 10764 bytes
SHA-256: fae0e1b7cef494e9e6237e5b6be4afb7d6a8d8632eef6266d514e339a487790d
font_01_sfnt_off000137ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AE 18616 bytes
SHA-256: 19cc37083604d125529416a7841c4289cedf276c8260f5aab1aad93f1a7187a2
font_02_sfnt_off00016913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16913 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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