Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afe6dcf8cab7eb9…

MALICIOUS

PDF

90.0 KB Created: 2021-06-29 07:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b10e931dd1e1366b99a1cc9f8aecd467 SHA-1: cbbc8bad049b515a798bf7e911b3463dc05c00bd SHA-256: 2afe6dcf8cab7eb9dbc6c47e94423e82556a0156ed3ddc9af0928d04d95b6c4c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick the user into downloading an encrypted file, which is a common tactic for evading security scans. The numerous links to compromised CMS upload directories further support the idea that this document is part of a distribution chain for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607802d850ac9---tarobedumemogapuxoba.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba896352717---26674059443.pdf
    • http://baaningdoi.com/file_media/file_image/file/7070320503.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6ba3892f7---logovafe.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caa36a5aaa---guvolojebix.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b6284b82bdf---pifiwulazosewabodege.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607880ffea9e7---55145850820.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/brdjdrl2diel4odold29vid6dp/gutipawinoliv.pdf
    • http://geraldkleinlaw.com/ckfinder/userfiles/files/48520001670.pdf
    • http://escuelasfutbol8.com/docs/files/bitonasekedatetujepa.pdf
    • http://pulsarvn.com/media/ftp/file/75317086526.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/rdq6qo5gp99upbnc92of7sdvi9/nofulavefinilab.pdf
    • http://architects-desk.com/uploadsfile/16550328927.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/158dbcb22ec84d4a3e3b5a3c233ac05d/60053827970.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc13fef246---1942423689.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a829b3947---wimigabagapuwa.pdf
    • https://elearning-chemistry.ro/userfiles/file/74128546125.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607800eb139b2---deratodogopebisunefoliro.pdf
    • https://asiarsolutions.com/userfiles/file/dolupezoravi.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c539adeeb8a---wavetisa.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/t1e35bg5kff65u8koa6nisoa43/zisoliwulape.pdf
    • http://acecaalcoy.com/userfiles/file/vevegati.pdf
    • http://bjaimama.com/data/upload/2021/06/file/202106211325234162.pdf
    • http://www.gesas.it/media/mailinglist/file/kutidiwafesipu.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64c9d992c3---ripana.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16085a8566f884---xaguzadojafebove.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=video+editing+rules+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_off00010005.bin
5bd3650625dc89a0ade01905b636743603c76454ea609ca984f2757c0ebfb7fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10005 16628 bytes
font_01_sfnt_off00012ae2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE2 16792 bytes
font_02_sfnt_off000142f9.bin
ac3021450b29396a24432fa7ddb152f26873f86d269cc125514b54923e2be6b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x142F9 10580 bytes