Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fce682a65ece41…

MALICIOUS

PDF

148.8 KB Created: 2021-08-04 10:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5c9ee5141e0692707ff9ae09ddfde50c SHA-1: d3bf967db06c1d3e6fd8e9bfd43f5d8489f71aba SHA-256: 22fce682a65ece41085c673e20296d3824950759688b994d2d7b51ede8ea336d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple external URLs, with several heuristics indicating they point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lure the user to malicious content, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9412

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://garglob.ru/uplcv?utm_term=buku+praktikum+akuntansi+perusahaan+jasa+dagang+dan+manufaktur+kelas+12+pdf PDF link annotation
    • http://sirmamedia.com/ckfinder/userfiles/files/94724054144.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/i9ge4g02dqbcurf3k0m7rl3ki1/lokijanosolim.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/a1afe29abbfb773e739ba34748617407/videti.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/koxixulij.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-24/20210624051732144397.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/94ufpagvcnt5fq8594icbb1l9i/vuriwi.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160d25fc153033---62156201982.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5196e3c8b---44140111788.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/61180610139.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b80030b8c1b---50294141434.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e28f23c5c1---lixifaputelanere.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/42209316668.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/nanijaliwewivi.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/ba346f6153116f7bd3466af0717698cb/gimekamimajixejegusoti.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/22051625578.pdfIn PDF document text
    • https://ntc-container.com/upload/files/mosonex.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/sileviterezififobivokopex.pdfIn PDF document text
    • http://computerdoki.hu/user/file/linebokotebodizewo.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/89020320948.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/ximojerunavojufu.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/vibosulabatixudazozo.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/rphvn7gm5fl176viirfr5tm2iv/pijotuxep.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1