Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec19b06640ce8d0…

MALICIOUS

PDF

100.6 KB Created: 2021-07-10 04:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c5af6e0476fce6429ada468718544b07 SHA-1: 1b6e9985fd55288f901dde413fd0e95aab1775b4 SHA-256: 2ec19b06640ce8d03f029fea232dba775213a0b37ea47ca565aae7efeea49877
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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://oniceh.ru/uplcv?utm_term=muriel+barbery+interview PDF link annotation
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5c0c8b786---lapatopepitero.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/dafolalivigitodijawerafe.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a83d58425cf---fitalilun.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cec52086e7---88524043581.pdfIn PDF document text
    • http://hkalc.com/userfiles/15192622935.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210519055903170.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/5hosgu4bfh44re47r1j2mff6n5/41920964860.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160801e908dd19---71611912870.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ovaqka9p2ti9jveaimqni1a1v4/defadesanafipet.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082c4fbf0c7b---kodogadifapogiwumonujojoz.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/7af93ac1d263c1954e674d96963fee3f/likerudenuvekebe.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/kuvefadunemizajigu.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/tilikulejejesalisuzelaza.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/kfbrouki17r2ll6qlkvgqm28v0/33543881920.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/85089918956.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2541f3754---35247128016.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/d2afe6509c4ff5e08cb256fd0e7c867e/7998792585.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/rejuxutibonudivufurejave.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608480fc2c94d---vivovenudonirevelo.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/36820599001.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/xobuwokopasulavotimizo.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/mubejebezilejufazam.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/30693466619.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/zizulimatudajalinutet.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4fb586519c---70971665321.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/37138917248.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_off000124af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC6 10312 bytes
SHA-256: 85a745379937ec63d2f1ec2ba32d448dae84929bb7629315a86ca297891c44a9
font_02_sfnt_off00015429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15429 18904 bytes
SHA-256: 83a55d43b856e9d96024ad6e5508ff317748de8661e24248ed62504e215f1484

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