Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbae895d18dae73f…

MALICIOUS

PDF

80.1 KB Created: 2021-09-09 05:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6861f19e27fc5f67545bc177fb4376fb SHA-1: 1b46fd8102214e703011907fb7b8792100520f9a SHA-256: fbae895d18dae73f440e53543e13576908eaeea8dea35df14a773ba4eb7e4e73
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious intent. The PDF contains numerous embedded URLs, many of which point to other PDF files hosted on various domains, suggesting a link farm or content distribution network. One URL, http://jnnycc.org/userfiles/file/sajupefupibaxasamap.pdf, is flagged as a disposable link farm, reinforcing the suspicious nature of the document's content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://jnnycc.org/userfiles/file/sajupefupibaxasamap.pdf In PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/69948434287.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/nabufutetilokow.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/92898834671.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/30176948125.pdfIn PDF document text
    • http://vladekoservis.ru/files/15420788919.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/dejiputi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b8e82eabe---solib.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/98156306237.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/66761509888.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/wapedoziponiweki.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/72704523101.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/41878968206.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/fujimuvokaribiresov.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/88261997966.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/xowawizefuxeki.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/gufususa.pdfIn PDF document text
    • https://china-glass-mosaic.vegner.com/userfiles/files/20210902_224852.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210909061030.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/68605974780.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/xetodonipagelenidilajewaf.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109070805342085.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/zaloduwudakubovekir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=describe+someone+with+the+letter+vPDF 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_off0000d5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 10624 bytes
SHA-256: 433ae1e68f7456ba649df15eee05d7d7258c12e5e175467be16dd2315dff2563
font_02_sfnt_off000105ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EA 17876 bytes
SHA-256: b914e3aede32882c00eecf747a7e078f1e60f38b4cda1d9c221e19736dd8bd28

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