Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad2e52b607bf363…

MALICIOUS

PDF

73.5 KB Created: 2021-09-11 09:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3002268058aaccfaf7e89310aa54bc7f SHA-1: 5aa3c2f3f17ac641d06f1b086621497f6518470d SHA-256: 6ad2e52b607bf3634e75fbe6791742637554a770785ca907d19429fc1750fc13
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, suggesting it functions as a link farm or redirection mechanism to potentially malicious sites. The PDF structure and embedded URIs align with spearphishing attachment tactics, aiming to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://allytemp.ru/uplcv?utm_term=todorov+poetics+of+prose PDF link annotation
    • http://hiredriver.com/uploads/assets/files/wobegejodepajenusamowej.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/30017009841.pdfIn PDF document text
    • http://sanruouvang.net/images/uploaded/file/77947929224.pdfIn PDF document text
    • https://flyags.com/editorResources/file///sewoza.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/zeloko.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/zubevabibitulikogotujarew.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613a33d59dc9d---62470025716.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/zoxokududegolituvolu.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/8680585629.pdfIn PDF document text
    • https://armature.ir/cache/fck_files/file/82619660481.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/59116007434.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/sidujirebijusotolatile.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/41132162587.pdfIn PDF document text
    • http://lyshiying.com/d/files/madakowirukukex.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/boxagute.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/79403820095.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/83006895707.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/pofixiwosinori.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/fudekejezipuka.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/noxos.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/wexegoz.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/59a97a988c06fa23856ec416080f6ee6/94842072476.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/98358935570.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/rigunowubidulewodobula.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_off0000be62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE62 16620 bytes
SHA-256: 525c613297277a4edb721ff2819a9a9828d3b589f5e087f575910c1ede7a5ae3
font_01_sfnt_off0000e936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE936 10332 bytes
SHA-256: 7a54fb46945d0b9b740bb2dadbe4dfe9a32af9815f823d0de6a682fb87a2bdde
font_02_sfnt_off000100a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1