Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2482dc332710edb…

MALICIOUS

PDF

68.5 KB Created: 2021-09-26 11:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1b409ea5afd7455693c778cf652caafe SHA-1: badb4adb6a90228986acbfbdde9414a0eb6767eb SHA-256: c2482dc332710edb9ead816005b22ded69be0bc4beb02006d0b22b8ce4e9cb9a
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to host further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yibetter.com/data/files/22944455260.pdf In PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/7505595b76879dbeeca5477eb84f0654/bujujesagosijivawokevipek.pdfIn PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/jenujugabuparewudemuf.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/62421016619.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/91635152383.pdfIn PDF document text
    • http://allineers.morefriendship.com/upload/files/95571726338.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/ziwamozedu.pdfIn PDF document text
    • http://maintenancebazaar.com/userfiles/file/kadafo.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/92586359506.pdfIn PDF document text
    • http://orderkai.com/uploads/files/76705498767.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/48110957121.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/vatosogamemujavib.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/69336455707.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/witifulukuperinivi.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/wonikikavafuleg.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/58717665788.pdfIn PDF document text
    • https://happyfun.tw/uploads/files/202109081005284355.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/91794189419.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/nofikozufajerabexosu.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/13615308343.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/datolevejepes.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/niserimedugabiniluwolujon.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/kifakoxiweze.pdfIn PDF document text
    • http://sbairs.com/datas/files/gudamudetoxikovuferigoti.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/xuboraj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=good+sms+app+androidPDF 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_off0000b022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB022 10316 bytes
SHA-256: 112ae781b5348592d9048be851ea7f1a910c09d34b9cfb6833016c04398008b3
font_01_sfnt_off0000c748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC748 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 15016 bytes
SHA-256: 5091ad9debf3909840ab9c8b67cb9cbd0e68aa6dcdb9a3ede920989c3bfd4111