Malicious PDF — malware analysis report

Static analysis result for SHA-256 07edd770c47e684e…

MALICIOUS

PDF

76.9 KB Created: 2021-09-01 22:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d3b453e8c6b05be1094dd0bb8ff61c67 SHA-1: 735a3ab995eefc8ac6a9e42dd97a1a2a2ce930c2 SHA-256: 07edd770c47e684e16d5fc7c4ffcaa74ffe0dc3e73e86afc882dd1b198223b13
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary function seems to be acting as a link farm to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 https://synerhu.ru/uplcv?utm_term=how+to+mine+compound+coin PDF link annotation
    • https://pet-fashion.ro/mm/file/wutoz.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/tomiv.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/79231927798.pdfIn PDF document text
    • https://campermagazine.tv/public/file/93979170647.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/sumerejomuvilajuxar.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/agshai2dn5b075a4am0ompup9l/10987890187.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d57b60db4---penamifonomajawakoxuzile.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/utfc9m3vi908j816fbpef876b5/21003587908.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f44dd7897a---koxugose.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/fokob.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210817144645_bgmuix.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/62600713293.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609231753e6b4---tagajewerafebavetupir.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f034d622a9---87097413371.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/61647949446.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/fesexanonejusovexirevol.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/783c3409350a298e794b5e9b0f0078f1/wilepixunibopozowirobube.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/rifunowetafax.pdfIn PDF document text
    • http://mospolytech.ru/storage//files/87814964025.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160853ea709924---45159144234.pdfIn PDF document text
    • https://vpmemorial.net/images/file/vokaxotidenolunusawijodur.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/d3e399bb178f433973dea1b069393c79/18010522569.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a25245ce3fe---77832675449.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/49460522896.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_off0000b87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB87C 15160 bytes
SHA-256: a364f17b459f7a86b61bb24e6d00debf75bf6f46285900c289455217ecdc0919
font_01_sfnt_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 10376 bytes
SHA-256: a482cf68ccc11c0353a93bc8eca26682abc7e6d85ded65ecb9a3241f85c04a6c
font_02_sfnt_off0000f613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E24 16632 bytes
SHA-256: e896d0c9c6509c93731645541c0836c845742b74f7fde2e8ff5e94baacc6a6a0

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