Malicious PDF — malware analysis report

Static analysis result for SHA-256 70db8deaafb5205b…

MALICIOUS

PDF

82.6 KB Created: 2021-09-16 02:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5e65014629f26ae4470addca77b108ba SHA-1: c9c1487ecfd5f778f8b431d3f77f0293c8951ee5 SHA-256: 70db8deaafb5205b0fa78ae767a270e157cb49bb8d0c1c65b8ea3602381c1017
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It functions as a link farm, with numerous URLs pointing to various domains, some of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to obscure the ultimate destination. The presence of 'utm_term' parameters in some URLs indicates a potential SEO manipulation strategy to attract unsuspecting users searching for terms like 'icloud bypass tool 2021'. No scripts were extracted, but the overall structure and URL distribution strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=icloud+bypass+tool+2021 PDF link annotation
    • http://acevina.com/webroot/img/files/10294194011.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce45bbed23---71837386184.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/43492815112.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/duzizuw.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/48327122418.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/maginoborogaxiwixerobajap.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/1f93005bb298f4fe0411b61fcb636600/selilabexenaborasesajinab.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/82850428043.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/28912726888.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/lewazogonubuzuzunid.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/girimadevabasige.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/57208654601.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/31912237e444ac874fe3942aeee1c43d/12458293232.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/3608537333.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__612EAF222F87A.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/83624441251.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/livitedogikevixakaloteki.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/81892323537.pdfIn PDF document text
    • https://hoangmailogistics.com/asset/site/files/bujoxekupapefakari.pdfIn PDF document text
    • http://htwy.com/upload/file/26260872014.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613158f53860f---dubirubiwufegusivevimen.pdfIn PDF document text
    • http://sunway.me/ROOT_PATHuploads/file/051014292297.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/lopen.pdfIn PDF document text
    • https://frisch.ro/files/file/fevibolilufufetokamox.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/nogovomovu.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_off0000dc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF448 10676 bytes
SHA-256: 4c1f9d3bdcd6aef9c130e941c6f9a62df8a7335f0d33c59f5bbf31a505ae7efb
font_02_sfnt_off00010cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD2 18540 bytes
SHA-256: a5d29664e5b55b96458e732b6691618d9fb48b06e3af214024fc9586813b0ee3

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