Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a94c3bd44f706a4…

MALICIOUS

PDF

81.0 KB Created: 2021-09-16 06:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3a00b62f3ac23b11ff10a63d26b8e79a SHA-1: 0a4c7a4ccb116121503b9588a118b522ae580a6c SHA-256: 0a94c3bd44f706a4c45820b2c0a72748288d5818d46ad6b025880fcefeccf566
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs, many of which are part of link farms on disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and the ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=side+by+side+stacked+bar+chart+excel PDF link annotation
    • http://thesciencenetwork.org/uploads/files/82518903349.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/luxawegoratowo.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/jemivanumejuwumegaraxowut.pdfIn PDF document text
    • https://apluskleaning.com/admin/images/file/tiwotumugitufan.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/gutinap.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/dunenujudepavilirukabeki.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/jekawo.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/gilesalonawolevirigi.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/sodoniruwoga.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/82168670538.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/fuzegi.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/pabosafuwebisufex.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/91067083721.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/disukesolerizanevovatik.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffe9a688ed---zesewajakotitatifol.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/xupofoja.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/12337328369.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/ruvipi.pdfIn PDF document text
    • https://zahidnawaz.com/UploadedImages/image/91226042677.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/329a76dd0372739a65496ea6bd87d62c/14290176509.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/48926604072.pdfIn PDF document text
    • http://dakdekkersindex.nl/images/uploads/13575555745.pdfIn PDF document text
    • http://schokofontaene.de/idata/98574024644.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/sinazavedaniligis.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/5201735577.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_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 18156 bytes
SHA-256: a7871719b8d068b26075480b7853a3f3af980575b83ef8b451999350ac24b115
font_01_sfnt_off000104ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D16 10764 bytes
SHA-256: 67b2d25b4c4034a72ec97b406a79edb49d20c61ee287eca2580b3fd5eca1dcf3

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