Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7069400f3ddf52b…

MALICIOUS

PDF

84.1 KB Created: 2021-09-23 09:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f89192479ab516a8d905f585ee6f75c3 SHA-1: fe43568569b33a067c26c10354899faffd025f9d SHA-256: a7069400f3ddf52bf46140844210414b9c1a21dd6754408435f0f1fdf6a5ad51
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://garglob.ru/uplcv?utm_term=dragon+ball+z+5
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3220243853.pdf
    • http://kraemer-duennebacke.de/files/file/4552995793.pdf
    • http://openendrep.com/userfiles/files/26550231445.pdf
    • https://bulgariapools.com/contents/files/53877508524.pdf
    • http://francescofesta.it/userfiles/files/bobedinitebugub.pdf
    • https://privatecambodiatour.com/userfiles/file/gugituxubenafemoziguperaz.pdf
    • https://www.aicsmindia.org/ckfinder/userfiles/files/61324863985.pdf
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/74455075218.pdf
    • http://ji-tien.com/userfiles/file/36422576884.pdf
    • https://sealskinz.ru/files/file/64379591230.pdf
    • http://godsownproperties.com/userfiles/file/26361728384.pdf
    • https://corianderedmonton.com/ckfinder/userfiles/files/sisegusutotawolumuviku.pdf
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/19577808270.pdf
    • http://goref.ru/files/file/66869136280.pdf
    • http://bidadapatidar.com/userfiles/file/degibifonegonabedipe.pdf
    • http://studioesflores.pl/obrazy/file/62653672259.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d90866527---xopidixak.pdf
    • https://hygradeinsulators.com/images/uploads/file/muruberewezumazonomuzude.pdf
    • http://bulgankhangai.mn/userfiles/files/24634697588.pdf
    • http://thcsnguyenvanhuyen.hoaiduc.edu.vn/ckfinder/userfiles/files/88705293419.pdf
    • http://partnercable.hu/files/jokanozin.pdf
    • http://area100impianti.it/userfiles/files/9984089817.pdf
    • http://elturo.ru/img/upload/files/kafuzewusokowokuzenoloboz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae3.bin
edc87cc51866e3f5c9bc37d160807eb88c53cd11db2334cf04d832fc8bffdd6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 10128 bytes
font_01_sfnt_off0000f1a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 16792 bytes
font_02_sfnt_off000109b2.bin
fe19eeeb3739db85dceb7b4625daeb56302255d76fc7d92cb706dcbdb4baf0b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 22028 bytes