Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0affb587f5bd10…

MALICIOUS

PDF

69.7 KB Created: 2021-10-03 22:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 019e5151fb9a049ac47f899b1b599dd0 SHA-1: 714248d29853c255b3588f3ac515c440cd17407a SHA-256: 2b0affb587f5bd1036fd5a8f13ea53630f63ebea796d0034e9f2c3ca25eef3e2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. ClamAV and ML classifiers identify it as malicious, likely a phishing or malware distribution attempt. The presence of multiple external links suggests an effort to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://thibangoto.com/app/webroot/uploads/files/kozexenofuvapufalaxoxafew.pdf In PDF document text
    • https://ahha.az/userfiles/file/83986216793.pdfIn PDF document text
    • https://ccskin.com/geektic/files/mepimolujasafitez.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/b8954811b3d18b13de9e2ac6c56215fe/feradiwitiwufulufuxifiw.pdfIn PDF document text
    • http://dsagco.com/Upload/file/26191790717.pdfIn PDF document text
    • http://guowangcable.com/d/files/waziromowovumeremi.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/tovegixoz.pdfIn PDF document text
    • https://computerzone.pk/file/vimovukotenagejonalere.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/76000455637.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/52424499659.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/lolosefoxuseguj.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/gaxabekogidufojujebi.pdfIn PDF document text
    • https://deverfgrossiercms.deindrukdemo.nl/upload/files/330373205.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/kogabawojazekixigimetuxe.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/fesadezelowusedevib.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/19097038121.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/wawixopuwoxog.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/7213984804.pdfIn PDF document text
    • http://hengtongblower.com/d/files/rilonarujinupovafo.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/6f047befe8c0a50f1f786c4bdcd1273e/47125194433.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/tovisusutetuvezufunolunin.pdfIn PDF document text
    • http://abworder.com/uploads/files/14205147387.pdfIn PDF document text
    • http://precisao.org/files/files/lasolozilexazepawowidu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=50+000+pounds+to+dollarsPDF 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_off0000b281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB281 10420 bytes
SHA-256: 6f4e6610b056f703532d16f9913e5c970175549a22d2904873d7909394ed34e6
font_01_sfnt_off0000ca3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3D 15388 bytes
SHA-256: 6f8a192711127a57a78e686e83e257f8c1d2f1009f1a0fcb57e3380d511af334
font_02_sfnt_off0000f11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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