Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06340b49eaa45cb…

MALICIOUS

PDF

72.9 KB Created: 2021-09-08 17:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5b64f1b8075ea83ea7011f814b6f8090 SHA-1: 1ee49595de9a21285c8beab44dd13c1f8c9522c4 SHA-256: e06340b49eaa45cbb472bbf4cc506bda11ac3ddff0849601d0f11c99e694a637
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, indicating an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://naveenent.com/administrator/imagetemp/file/70391085869.pdf In PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16133d6a0be885---wafinejetozuperal.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/rodorolagizelobimo.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/witebazorakonakisu.pdfIn PDF document text
    • http://chernogolovka.inhome360.ru/admin/ckfinder/userfiles/files/dejupujilase.pdfIn PDF document text
    • https://keyword-lda.pt/site/upload/file/vuledifisufawovulu.pdfIn PDF document text
    • http://julianina.dk/upload/file/kobonina.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/82795495972.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/pezugasuxekurigizoxi.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/e31ae30389f8cb054280c068641b2d24/98164623273.pdfIn PDF document text
    • http://usmleworkout.com/files/file/31895752551.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16138a57b7ecef---47110449505.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/89064978075.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/dolulalagibos.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/sanot.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/gesomaxegemiposapazube.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/gaxitoluxigewokebu.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/mufekilagatasigutolut.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/37795916647.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/51704406236.pdfIn PDF document text
    • http://topbuild.net/content/xuploadimages/file/61020078400.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/74949266349.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/81964824944.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/zemizurokegef.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/38920888115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=agilent+1100+pump+service+manualPDF 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_off0000ba1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1A 16528 bytes
SHA-256: 0b8401c32d5d24e93c310e1088eaf267364f9a6141b2831e9157774b993c345a
font_01_sfnt_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC91 10916 bytes
SHA-256: 1c575939ad7f6325f0b717b65e78d8324026ea0f425d1ed7007011b57c85e355