Malicious PDF — malware analysis report

Static analysis result for SHA-256 152dc53567b653a2…

MALICIOUS

PDF

89.4 KB Created: 2021-06-25 23:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3ab9e9472be14a4e731d2434d044f4f4 SHA-1: 4b8a09c9270aac3b876b33713071bb497fa283ea SHA-256: 152dc53567b653a221305c76bf04d8f89afecb236c41a42e986fe75fa255368f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF format and the presence of external URIs suggest potential for embedded JavaScript or other exploit vectors to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9752

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://pass-eco-energies.com/ckfinder/userfiles/files/lezuteva.pdf In PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/sr6pkgfcgtman9tg8erjt0mr3k/12094254138.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/diwokilodanefagigituxav.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/47670690581.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7527c2da07---sivizozolevaruzuj.pdfIn PDF document text
    • http://midel.me/userfiles/file/25027777829.pdfIn PDF document text
    • http://aweibel.com/Photo/file/vorakewefopolibu.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/bad9ec0d4cabc31a6f7ce210e9c59faa/85115495292.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/6a4b0df433559b596319773131824172/64216755834.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/5766726903.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/04511a5506c3b612feab3d5e17180fc4/30466788548.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/1ebd95e19b1422355769a17b6cd3fc08/gizikazigufapiwutozani.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076d83d0d32b---jojobolobobalebeva.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/95919693422.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/kitukowogeve.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/fcjmg7567ufkg8ocuisotmjsha/81842413698.pdfIn PDF document text
    • http://wxjsyd.com/userfiles/files/47670209570.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/rtnknbcftfdshkilphm416mp1e/2688232398.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607120cf42f11---16031415326.pdfIn PDF document text
    • http://kotolantopeni.cz/file/pumulixegidun.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4e2c1ff2a---85461105019.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/maviwitesovegibesobim.pdfIn PDF document text
    • http://kgmda.com/upload/files/forimewibiwebugiwifona.pdfIn PDF document text
    • http://furniture83.com/upload/files/rataxane.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/56935572781.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/899741a7579a7b6f511a1b59d5108599/19405707564.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=write+the+first+five+terms+of+the+geometric+sequence+calculatorPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e26151e8377120234f2e5565f3ffcd2f/bibitugidipewefeleruvi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 16084 bytes
SHA-256: dae5038d748b2b7d89173d83a61ff0ceefc2856cc76f3bb6f5837745f88f8889
font_01_sfnt_off0000f6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F7 11088 bytes
SHA-256: 85cd1c142b086ad6ed87bee40df2c02310f3cb16073dd7e041b8403a366b288d
font_02_sfnt_off00011062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11062 17696 bytes
SHA-256: cfd08eb2cc7d8bec9f903ada7fc2973d74d77265d7985fcc7e5673e8ba441201
font_03_sfnt_off00013ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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