Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0dc0e9d8fd2f213…

MALICIOUS

PDF

72.6 KB Created: 2021-09-28 02:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 66d6dfb088cdf521b9fcb6f2ab686ef4 SHA-1: 1f0fb9bfb29e72407cb5ef5c970c1cb2c14a466d SHA-256: f0dc0e9d8fd2f213279f9c12be1b29ecacc40eb0925350130e5a1ce8665ea757
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm with numerous external URIs pointing to disposable hosting. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a non-clustered link farm, and the presence of embedded URLs suggests an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://drafthe.ru/uplcv?utm_term=pubg+lite+app+without+obb+file PDF link annotation
    • http://3dtechgroup.com/uploads/image/files/58004589878.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/41382517288.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/mupabizo.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/jaxevenizafasidupepu.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/gotinakizesukusenemu.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/paniful.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/vugopuzoxikakotomomet.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/jarimimilesezitofelonuve.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/24160392639.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/3cafab874bb0db7e57d43da17709028a/84792566262.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/17383116776.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/xolurajuvo.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/dubatebezemaxa.pdfIn PDF document text
    • https://saglamahsapkutu.com/img/editor/image/file/77612522250.pdfIn PDF document text
    • http://egitara.com/upfiles/files/jisudubibapeganiv.pdfIn PDF document text
    • http://irollee.com/userfiles/file/53196371988.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/rogurorimudosubikupojave.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/75730079254.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/bukag.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/d63b914ecd09d1d4a68f643fb3d64abc/pidokivori.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/13125503894.pdfIn PDF document text
    • http://gradn.ru/uploades/fckeditorfile/84162362427.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/gelageruj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB54D 17656 bytes
SHA-256: cb379c473243045606dca4b87b709331ab12488d595873a33cd61be1bc33d537
font_01_sfnt_off0000e2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE2 10592 bytes
SHA-256: 3a760b2025a417dcfe4615b37e53e04f9dc1a3dbfc5115e1d0116c56b6e77192

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