Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b004c8094f0205c…

MALICIOUS

PDF

81.6 KB Created: 2021-09-02 02:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 89a96b7528d986fb2352d7cfcccdf531 SHA-1: 444588b74c56280e95412e60e6a067b7233deb2e SHA-256: 6b004c8094f0205c06eb9bd23702397dcd955a0e6b85be0584c55817cdb9a664
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm containing numerous URLs, many pointing to compromised CMS uploads or disposable hosting. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure and URL analysis suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa1af5f04d---92979891134.pdf In PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/gowemofomivadedexojebop.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/36900237167.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb146dca2b1---toruzefesedopima.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/6cbeb53146a6284dcdbf81fc8fb9fe6c/35964703677.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/xolabobimomara.pdfIn PDF document text
    • https://t2sc.me/userfiles/meguwamewenukafofupo.pdfIn PDF document text
    • https://edarky.net/data/file/gimulanivewifezifulen.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/46390248584.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/dadb05892b39b8a6980e8e01b2dd63e4/pexanib.pdfIn PDF document text
    • http://retailcop.ca/files/38545561900.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/makokometodopasu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34ba10f0a9---kazubezunobowoj.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f00badf34f---98059660105.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/f785ac735d783e0ee4d18d20920a38e2/86396100147.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/nivekudiworegeramis.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/47182652190.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/zikixodux.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/30421419104.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/dgecut66ettq361kko0bhvlcto749ugd/vaxupedudelixulirori.pdfIn PDF document text
    • http://damoorefamilyreunion.com/clients/7/71/71c8bb141a0941b69292984b9770a174/File/jovavovivazirenoxarutefal.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/3998713d6d0c3a7f150e5bf3848d113d/korobigojinuregalefud.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/094cb37f70d529179183018757e0e656/54421128446.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/fukovutu.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/lifebutusaxijunidesexub.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea62bebfea---21461582416.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+get+the+nether+star+in+minecraftPDF 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_off0000d74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74D 10812 bytes
SHA-256: 78220557d3a18fe8c40146ed7dbe19a11523fe40df5d77e1c0cdbbcfeaf65976
font_01_sfnt_off0000f016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 17936 bytes
SHA-256: 0f3537ef1fb0c3cbe93efc9672a0601f6c1502243ece68f200e6848ddfb86cc7
font_02_sfnt_off00011ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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