Malicious PDF — malware analysis report

Static analysis result for SHA-256 472652e202b3cefa…

MALICIOUS

PDF

86.8 KB Created: 2021-08-03 06:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 976aaa3833be32b51a49598489748a80 SHA-1: ed42e34fbffd601fdd0fb1a4d90b6dfcb62356cf SHA-256: 472652e202b3cefa0ae722cc0fce9cb693a4d7d72fc55c6ca75a2ef32d99fdc4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, likely serving as a distribution point for phishing or malware. The presence of multiple external URIs and link farm indicators strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.peretprod.ro/content-images/file/redabevuperupaxosafu.pdf
    • http://daehwa.info/uploaded/file/81137382339.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9012861de---rekigesufazikutalowe.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/dsq6nl7pkj1p2140ii1tflaeo4/kovugipi.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723f47df2e0---dijivijojetisimamusewepa.pdf
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/3153912439.pdf
    • http://topoint.cc/userfiles/fckFile/20210617223251.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/01ee53a0f2a658b8cf64e24f1c7a9df7/newujumibawezuvira.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/583a5f1d1cb938774bd8c185338dd3a5/52936361501.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a96f290d9a6---ginoripebukifi.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160d852e182f59---sajinapiwupusobowujeleg.pdf
    • http://abacusnancy.com/userfiles/file/30030499341.pdf
    • http://itineraire-consulting.com/ckfinder/userfiles/files/tatizedebowupevudupamu.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/7ec070e416b2229cc608d832b37874cc/94477613815.pdf
    • https://autosaloncenter.com/uploads/file/xopazepukubavudasem.pdf
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74864438465.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770a353c5af---zamiret.pdf
    • http://piqiso.ru/userfiles/file/6832533118.pdf
    • http://merwepizza.com/upload/file/75804676158.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098307177ba2---xapiwesivumaxutusesutu.pdf
    • https://avgdesign.com/userfiles/file/papafemivesoporalikam.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16074a57a35e91---81546487660.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cc57154ff---31995604276.pdf
    • http://saxonrt.hu/img/userfiles/files/dapiwelobawapavo.pdf
    • https://99shayari.in/userfiles/files/zewunetoxekunoroxubefu.pdf
    • http://sansboundaries.com/clients/f/fd/fde0d4b6b324343791c5f0705b221951/File/wulilutapevorif.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=java+software+solutions+9th+edition+pdf+free+download
    • 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_off0000eedd.bin
d799d0007e0b2634c61a4f50bff1885699c15a539bfedb9a44255c3d4c345e48
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 11008 bytes
font_01_sfnt_off0001086f.bin
8744f7354fb321a661919e319c136093becdba83fd96b7380aa2391e859f4d2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1086F 16772 bytes
font_02_sfnt_off00013409.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13409 16792 bytes