Malicious PDF — malware analysis report

Static analysis result for SHA-256 9902d8186681f293…

MALICIOUS

PDF

80.6 KB Created: 2021-09-10 09:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0f47f843fdf5bc07fa256d2be377e595 SHA-1: 445d43d5514fea77d5912de8cd18176ba695f84e SHA-256: 9902d8186681f29335a380c1e88a068f9346378dae55588b134f02cdbb5a6f59
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to unknown or potentially malicious domains, suggesting it functions as a link farm to distribute further malicious content or phish for information. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/39c423966372a063d01a45cf013ef167/11664767564.pdf In PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/xuratav.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/90019635173.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/musizaditok.pdfIn PDF document text
    • http://redskap.ru/userfiles/file/bisapimilegagedewob.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/20091180430.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021991732374426.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/voxarikibawobupibexanava.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210907_02FF9569E0996DA0.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/28560489881.pdfIn PDF document text
    • https://morabia.fi/images/file/80488775712.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/45647016002.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/70637576604.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/55047209929.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/domofasefidem.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/35437841900.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/21612364917.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/dufumunekutoxumozumadixo.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/dijokijoxer.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/4113962605.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/79597379555.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=qubool+hai+full+episodes+online+freePDF 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_off0000d5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F4 17716 bytes
SHA-256: ac7193105af10650ffba8366376dbc5035458b347750f483c97e42251e735394
font_01_sfnt_off000103cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE2 10796 bytes
SHA-256: d993a7fec94340742a0518c6f56525f33d74a31fda75a30423ae69658bf166db

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