Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58db05326a4e4e6…

MALICIOUS

PDF

83.2 KB Created: 2021-09-20 00:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0b11e44ee97dae6028449cb75dbb74e1 SHA-1: 18ce4002b102f24bbfed4ae576f323f5f1ccfe6a SHA-256: f58db05326a4e4e6dc2ac8c16e63a7eebce7b66a1a91deb76dc983380d72a64c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://oniceh.ru/uplcv?utm_term=super+mario+original+apk+download PDF link annotation
    • http://tobn56.com/UpFiles/file/76345306926.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/fujow.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbd4b8ef4c---89409535041.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/58883946266.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/vusunapovisonaluwigu.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/tavesoxetununegi.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/nomorisume.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/75133978740.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/tikewutu.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/33341460016.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/dodobukebuge.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/bofezo.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16145d3d944da1---94145158083.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/nozetozaf.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///93367594831.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/lezekuvawusaxib.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/67867097034.pdfIn PDF document text
    • http://abpaluso.com/upload/file/89661298200.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/70537765647844918e896081db2b0a9f/gejinufitif.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/15070948828.pdfIn PDF document text
    • http://travel-door.com/userfiles/file/besikajilokuza.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/47050339235.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/pakasigigezudibijukafogon.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/wirunamofevibob.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/93681198820.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/77178506593.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_off0000de65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE65 10820 bytes
SHA-256: db237401bd52c976f260a0cc7c0f39d1f269e8b05f4e58bc83b1350e2217737e
font_01_sfnt_off0000f716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF716 18740 bytes
SHA-256: 7d29d644757faef562fa1215da41e2fd699e585e5b842f7a77421f8fab7cf20c
font_02_sfnt_off0001272e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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