Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1d20c044c3854e…

MALICIOUS

PDF

96.9 KB Created: 2021-07-14 02:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2f517ece966a8c8f5901e6088a844cd2 SHA-1: 1e0f41d2df75072092a5361c03beb182a53f7315 SHA-256: 0e1d20c044c3854ef942164eb7c187674c6b2a32828c5c1a23d3cbc257339615
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://ncabhsa.com/clients/875427/File/pakunoluvokosisuzugu.pdf In PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7b31c7f81---75914025798.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16086660159321---43107524261.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/50175475795.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9cb98bc4d---zenidekiwolujasepe.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072846a002be---22896623053.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090cf2748d2b---96651633737.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4cfeec53e---merefo.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/e37gn1psfh2bveovu9qe4n9tv1/xisimo.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/lasaweburodufenisiw.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/1aecff774869aa2e3904db0ffb7ba4a7/46769355073.pdfIn PDF document text
    • https://esz.jp/img/editor/files/82461821353.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/681e0dd48a494084cc32af661e1098a5/kiwewovefexenijobutem.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607228b585f53---26679102131.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/61250b6672d6218b20a94de7310bae43/35749033931.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608423fa86d3c---dolufupinoxiragavoparu.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/monevo.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/e55772bb01b202e4691422356d6438c9/sukupupeluzavexavivuxitez.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/6c494549e90500dd809882cf6649fd44/46557585796.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/36588548734.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/78d7ae4f5e6e83024ba0543a9dc7ad78/12950013727.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/5c3e07fdd91f68ec43706ebd4b73c958/lurigufukagofugekizejaza.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/299ebcddb443110180144a448e177dec/25470042223.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/wuvilokoresux.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/1326500033.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/ropizudiropiwolerovexigi.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/fatepilukam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=i+love+cheap+thrills+my+dil+goes+songPDF 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_off000113c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDD 11092 bytes
SHA-256: 9531f17321a66265a386e495c1f058624ea8bad56a08a5e2b0dec3f4c5a27675
font_02_sfnt_off0001455d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455D 18012 bytes
SHA-256: ad1d5906f311cd3f90933bae26505b3522ec53009acd8bb76c10fc95251dc001