Malicious PDF — malware analysis report

Static analysis result for SHA-256 29297122a3e64382…

MALICIOUS

PDF

75.8 KB Created: 2021-09-18 21:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1b56305bd112072d7d0520681c69da23 SHA-1: d548e6901018ec899688fa8f10a8ee837f658fe0 SHA-256: 29297122a3e64382aab0ab2fce1fc1f65f39a96e55878a07380f9da9cb479840
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the PDF acting as a link farm, directing users to various URLs hosted on potentially disposable domains, which is a common tactic for phishing or malware distribution. The presence of external URIs and IP address literals further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305ebcb299e---xamivafu.pdf In PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/56271321075.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1613d01b1b28db---9175080451.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/81053762989.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/3342220759.pdfIn PDF document text
    • https://bloomeng.com/uploads/dogexosofedareretefiz.pdfIn PDF document text
    • https://pcetravel.com/files/file/26989203938.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/setax.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/44779587042.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/38070955019.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/fedunalumukowoko.pdfIn PDF document text
    • http://tartak-monis.pl/tartak/images/file/jotizewenetexafokesev.pdfIn PDF document text
    • http://agrion.org/upload/fichier/nafevug.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/92687238019.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/56241244539.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/jubazixomapal.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/salepanexadanutubawetazas.pdfIn PDF document text
    • http://freestyler.cz/img/file/mepojofenaweloxof.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/68581795872.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/memazosobajep.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/punisof.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/76514215409.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1612eacc9cfa65---74151756608.pdfPDF link annotation
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/vukir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=manual+de+trofologia+pdfPDF 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_off0000c41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 17564 bytes
SHA-256: 2fa049c080e129d181c94bab59f4c06b79d25130638a428b7757f703637037a9
font_02_sfnt_off000109b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 10600 bytes
SHA-256: 5fb2396d5f41d7bd52d96a719a2fe24e7440a1045dc0267658066f0e0cdf5e3a