Malicious PDF — malware analysis report

Static analysis result for SHA-256 a095263971410025…

MALICIOUS

PDF

74.2 KB Created: 2021-09-01 09:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e509de68c4813f1402401743c1d47681 SHA-1: 69f7071853707a9b2204787c953dbd1c9fe2e86d SHA-256: a095263971410025e3970728944a96f4555ea94a89c7c201e3baad8f1b31bf4c
156 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, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on compromised CMS upload storage and disposable domains. These links likely serve as a distribution point for phishing or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://balajitutorial.com/admin/userfiles/file/tekixegufuxonipe.pdf In PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/devunuwuxoginanelulobiw.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/0a844254517218867bb0e47033a00d52/8040832817.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/064ca505e714cf7c2a8750ecf69ccd31/80448575825.pdfIn PDF document text
    • http://vienhung.com/webroot/img/files/59906244803.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/j2jn5p9hutn9d00scnthp25hv0/pikotun.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/pireviru.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/2do9acpcof3b7tn70mpfg58tei/mukosojikumodimu.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606d22bc72d6d---giduzanimuwo.pdfIn PDF document text
    • http://webmenuplus.com/images/file/kukeb.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/fhafnv9t0nhpj5760pi0moqq54/jakumimedulisasosawilogu.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/efa896f1b9378351fb6113a626b04398/lazisenekuwagobib.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/07jvukjb305dqb0l67e5755lk4/pususakimewagebomasuv.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/fe9c08b9649b432a1a22d0f407a61f40/22344947562.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/janebugubuxezagukavipoxaz.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/bcb702d1525dd41fc879dfd800d05885/jetagu.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/voluzegiwumamigusoz.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/28368923762.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/tepoxavezumokimanasun.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c2f3a2053---jaruxixamuxa.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/simivowogawudetojowawigif.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1m94875kb1o0pgf5mpc5oh27h1/bubemunikavus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=i+look+forward+to+hearing+from+youPDF 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_off0000bf8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF8F 16656 bytes
SHA-256: 230b23ec3c2a8bf4a3bf0fd8e5d55f3fee9df55bda260ba4312d15ba69490fc8
font_01_sfnt_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 10976 bytes
SHA-256: ae2b3c2c3e369a7659b89a875d885b07a32288c0b987b15d4041287ad8c94036
font_02_sfnt_off0001030f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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