Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f396117a4fd64e…

MALICIOUS

PDF

83.0 KB Created: 2021-09-16 05:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 53f0d87b71053ecee2ddb7c60ac7d144 SHA-1: bb2aa6800a12dc760512855b8036bdefb2b257c1 SHA-256: 29f396117a4fd64e5b2082740a5e9ce2f4b10b6c9b53a2eed540c93a2d61c52e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://huntic.ru/uplcv?utm_term=watch+coming+to+america+online+free+123 PDF link annotation
    • http://kirakuramenandsushi.com/uploads/files/47426281092.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/53170806843.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/56699468694.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/c3d9c3498fe0e72f5cbd2fa03166664d/91893976754.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/91798203300.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/vejowusenupekomul.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/gerolob.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16141d5b38a57d---83411809557.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/98905839047.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210907_fbea3.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/42287873807.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/gugepikakokavofutumob.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/lezazetopalumup.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/52324681913.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d7b4e3fd4---41773609267.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/47600955619.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/40892393061.pdfIn PDF document text
    • http://holzweiss.at/3565614412.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/fovidaj.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134765c4ddb9---mazukuwisetuwojefi.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/wepakuzeb.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613677ee5c7e2---68501898876.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d7002d0e9---lifavawomalim.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/38876528958.pdfIn PDF document text
    • 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_off0000dcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB4 10952 bytes
SHA-256: b008e786cc246fce7332b3bd920a59d1e6d0d08b703a10346069da0d98c8ae4f
font_01_sfnt_off0000f60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60B 18412 bytes
SHA-256: beb6ea788d0d8943b74263ec3b21e1259360928f4f6fd3e203172d7cb8916837
font_02_sfnt_off00012604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12604 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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