Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b2b745ed8f52bd…

MALICIOUS

PDF

82.3 KB Created: 2021-09-23 15:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c1252f9cd8022a80deb04bb4bff500f SHA-1: 913599378fbed2b5849678dc3c3818dd7e908eaf SHA-256: 46b2b745ed8f52bd665a41fd3fd32cd0064a1a73c03ae1ad8d187d601a41e0bd
156 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, specifically as a phishing or trojan. It contains numerous embedded URLs that form a link farm, directing users to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://niboparis.com/upload/fckeditor/files/41146122309.pdf
    • http://detskypohar.cz/upload/file/limafajoxijupe.pdf
    • http://tvsatkrosno.pl/userfiles/file/rakonekerebolanurobefot.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/mosalokajunojoxurikores.pdf
    • https://chennothinterios.com/uploads/file/75725776750.pdf
    • http://tks-forever.com/upload/2021/09/09/file/36546969153.pdf
    • http://doubler-son-capital.com/photos/files/vatuvoxepebak.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c691445f93---41567580657.pdf
    • http://globalone-mould.com/gbw/fckfiles/20210906135221.pdf
    • https://lescourailleurs.com/upload/editor/file/kejuxumevopenep.pdf
    • https://wroclaw-effatha.pl/grafiki/file/rofibobelana.pdf
    • http://glovimex.com/uploads/ckfinder/files/24548433193.pdf
    • http://restravel.ru/ckfinder/userfiles/files/20508932771.pdf
    • http://newbusan.net/FileData/ckfinder/files/20210903_E69130061EC6A722.pdf
    • https://fuze-pay.com/ckfinder/userfiles/files/9589615177.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5c549bad3---16652376848.pdf
    • https://radio-aurea.eu/files/file/mojixamuzokef.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16143b59637187---demomuwafuguvozozirojowa.pdf
    • http://yonetim.e-cari.com/upload/files/rulunupugokinopagi.pdf
    • https://mbzl-pro.xyz/web/img/podborky/files/lobajolimesedasewarasuren.pdf
    • https://fsreloading.com/userfiles/files/rubepemalakipomeg.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16145b6b3d6411---39417991415.pdf
    • https://ubk-sad.de/azubi/userfiles/files/35866236647.pdf
    • https://wroclaw-effatha.pl/grafiki/file/52340877029.pdf
    • https://zagorjeadventureteam.hr/files/tolijowelukovozedaxop.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=japanese+schoolgirl+confidential+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf7.bin
a29ce203b0ce62cbcaf7d453a24df5f8a95d8769804dddee420eeec6edd4fde3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF7 18048 bytes
font_01_sfnt_off00010b00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B00 16792 bytes
font_02_sfnt_off00012317.bin
2e44113fb445448f531a855cc3d67e7f9abe1f45f622f85e7dbbe421a2036012
pdf-font-stream PDF embedded font (sfnt) at offset 0x12317 10892 bytes