Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30fc66049d5b798…

MALICIOUS

PDF

89.7 KB Created: 2021-09-02 19:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 63b12cd8ed7cd6d194b2e3db0a43d555 SHA-1: 1a64821dbcf36fee6fb0684064cbab8dd34a64af SHA-256: b30fc66049d5b798d325d743ac35bce5736f4247b6f5cedd9a9d85464c521d21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm pointing to compromised WordPress sites. The presence of multiple URLs hosted on such sites suggests an attempt to distribute malicious content or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16120e47b31948---wozijiwo.pdf
    • http://svb-volleyball.de/userfiles/file/26000574581.pdf
    • http://alliance-ltd.com/userfiles/bitimakudowadibedutujiver.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/572na0luvqem61jdeq6ahgud79/59908736198.pdf
    • http://t-eamplus.de/web/editor/files/68782996039.pdf
    • https://satybharat.com/ci/userfiles/files/85734926740.pdf
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/44726614459.pdf
    • http://afghansolar.com/userfiles/file/futumifofobalefugesatumi.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088a74a74da6---67419266568.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b797ee96293---62012122726.pdf
    • https://alakharia.com/public_html/userfiles/file/98958831903.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076e4333acc1---sovora.pdf
    • http://bigandtallking.com/userfiles/file/zadedorisemubabotobete.pdf
    • https://kingdomdatesuae.com/userfiles/files/44389768666.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160abd32574c6f---44688671491.pdf
    • http://giaexploring.it/userfiles/files/niteledazaw.pdf
    • http://kpdb.org/userfiles/files/1682846279.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/rcd3ftnisua5e8j66dt6iii1nn/32135087089.pdf
    • http://www.aqsclimited.com/EditorImages/file/fofixowumox.pdf
    • https://condominiobrisasdelnorte.com/userfiles/file/66298528597.pdf
    • http://pivotal-technologies.com/userfiles/file/12642281295.pdf
    • https://goodline.by/userfiles/file/setapajavovanufulilon.pdf
    • http://lapenya.cat/imgjovesnaves/file/zuvifunelagaripamudugomin.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcad068be5---12084160856.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=printable+handwriting+sheets+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_off0000fbbc.bin
4657cca59d8d7b4d35e0dd09b17ab37549342487a6283e881566e9395c7460d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 17240 bytes
font_01_sfnt_off00012845.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12845 16792 bytes
font_02_sfnt_off0001405c.bin
0f8e0ff96b9bfac583314c00712f21e36ef9172b1cffc67fcdcb0f2f913c8ee8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1405C 10884 bytes