Malicious PDF — malware analysis report

Static analysis result for SHA-256 e445f4b855d565bb…

MALICIOUS

PDF

82.6 KB Created: 2021-09-03 10:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: df856144e6145a40c92597151d1edc55 SHA-1: cff63489fa729dd7ccf6d204b65ccd13f97a5af1 SHA-256: e445f4b855d565bbe7bf9a5295c1e9540992bbec12802c9fd7a6d123cb7141c1
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the document structure and embedded URLs strongly indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zae.me/datafiles/file/93960901774.pdf In PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/zodasuvolivovuj.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/0553edabb14d6c501b84529941efa128/53268785851.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/45799939265.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/76600382258.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/9h76ccblfoaj08jubg4v5fofbr/fawafibilojijafewekapi.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b02ecb7c120---92485341839.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/52636248021.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/bemosa.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ff2e6c3b7de---46334369053.pdfIn PDF document text
    • http://bonsite.nl/phpcmsys/file/58031369602.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/zabunulisajiwasatenipa.pdfIn PDF document text
    • https://premium-house.uz/images/file/fuxorarusulafeseseruzum.pdfIn PDF document text
    • http://scan3dsaigon.com/upload/files/88336937028.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/43850096257.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/34382971425.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/8c30726b1b434bdddc0134c83654bada/43361081239.pdfIn PDF document text
    • https://amblamy.ee/upload/file/fosud.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/72e402a247ad1db0556d3a6e1ad38187/nodetupifa.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/c9n81g7i7b5pshilg3hqfpdgs1/fuzowikofewus.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/juzakarojajiwabow.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/16318402460.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607e16aad8777---12433181287.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/fd35c571865fab1dedfc4a7e94cf8803/wepirasoz.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/9e479374ee35bae070298e47c5003004/71031935606.pdfIn PDF document text
    • http://thucancakoihikari.com/luutru/files/93857511331.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=victimology+in+south+africa+pdfPDF 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_off0000ded8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 11120 bytes
SHA-256: 423902bdcc5cefcb92b8d78bd6c545b7f8bbfac23751d4786f671e50e1202024
font_02_sfnt_off0001107f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107F 17260 bytes
SHA-256: 5b83a7b871f127aab34bc2352896ec746f51c938ad9aa6a36a961573d83c21c6

Open this report in the interactive analyzer, or submit your own file for analysis.