Malicious PDF — malware analysis report

Static analysis result for SHA-256 4014f3db4a1ee09a…

MALICIOUS

PDF

86.4 KB Created: 2021-06-26 02:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9ef4a8968c7cbca44f83b0d19e74d955 SHA-1: adddab9176c1c1f5a7bc01514557518e3bea942c SHA-256: 4014f3db4a1ee09aeb049f9207faaef1d753c3fc7d6e2a8506c30b59afdb31e3
176 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of an IP address literal in one of the URIs further indicates a suspicious attempt to bypass domain-based security measures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • 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 https://nasroglobal.com/userfiles/file/pikusabudiroxakilito.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/f0691f8c3f5b6fb0984c6c019dba6af2/bumadexuludozore.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f75ae383---25224613002.pdf
    • http://dachastyle.com/userfiles/file/sabujawivesudajototuloz.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2102fdab1d---duromedoj.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa9af6ec98---zawipemosumomumomixut.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ba9de139e---risitisasujozuvibos.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aa08b58ba1c---miwijofenabalexuxobe.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e7a9a3086---35619630678.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6cfed8b6c---60312326070.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/6ce37d8d9216b5c89d2cf09f88b77d49/82194466931.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/fe50e414a36badf4b1a6f713d9d51357/15908714798.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d20c683adcc---85368206046.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/i5klfhbq6rkiin9s2du0kc1re2/sunididojapotaf.pdf
    • http://0vote.com/ckfinder/files/jomovopamavor.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/c4b6518e6f1e41cd4e75da827c32158e/79399825247.pdf
    • http://www.bufolari.com/public/immagini/file/tuguluxonilukiginig.pdf
    • http://fouladsazanco.com/Upload/file/67996533387.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe3a9a07b6---tegevobemomazojajakumu.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bfda3f2d447---97423608911.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908b7e8e587---60702682620.pdf
    • http://axiomestates.com/userfiles/file/50969025102.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c94d723d14d---82615696759.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/jlkqond2at8iu5uoea1nl6vrr8/viposadi.pdf
    • http://harchovyk.com/userfiles/file/1772439476.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=except+malayalam+meaning
    • 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_off0000eccc.bin
c0fc6c2167a4a40c0c156f9bbedbb28229c9d23a9009941ba1aa630ed1deeeed
pdf-font-stream PDF embedded font (sfnt) at offset 0xECCC 10528 bytes
font_01_sfnt_off000104bf.bin
42b8d108a22a051697b213a8e1f602f2cbf4c7a01f83c8afda5fe1058dc11243
pdf-font-stream PDF embedded font (sfnt) at offset 0x104BF 17624 bytes
font_02_sfnt_off00013231.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13231 16792 bytes