Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97c581c2a87a811…

MALICIOUS

PDF

73.6 KB Created: 2021-09-05 10:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2f7a3bfa619781b4ac643d95d70416ff SHA-1: 6a32c6789d2172c5ee8051cfd04db8b3b3b0c7b2 SHA-256: b97c581c2a87a8110183819de0756967da739707bf95b77bc8183a3eca3ee502
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to obscure the final malicious destination. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is designed to lure users into clicking links that lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://blueyee.com/upload/file/310307056113.pdf In PDF document text
    • http://angelcabrera.com/FCKfiles/file/toxor.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/8260840898.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/0ad0b3616e5489e2501c93ec184d08a2/82053398585.pdfIn PDF document text
    • http://klpa.net/userData/board/file/libojuxulowujite.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb83454fa23---82737641545.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/mositazalulenomit.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/08b5819dbf4aff5ae661a893f322bb7e/15336988360.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/nenisuni.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/ginimipazolupofexan.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/revosukiruzuj.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/23914881994.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/12c65f2d3999359f1123bba2b22931f9/wupadetadizo.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/7a6d6cdd12be58df276ab175728b7dfb/78294403579.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074368b5444a---guwemivofuzesed.pdfIn PDF document text
    • http://wirheiraten.de/images/file/93809499174.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/lubomabaxisakiwalixudiz.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/munujisotirojegexapuvufo.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/29169104041.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/5122557130.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/61735988425.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/begiwoxid.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/79217406976.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5b7dbf435---60071420638.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=integrated+chinese+1+4th+edition+pdfPDF link annotation
    • 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_off0000bb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB40 10932 bytes
SHA-256: d85823467a9f1b7cf6211ce7ee548b1f9c9de1b1166a06ceb9448726394f47a0
font_01_sfnt_off0000d464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD464 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC76 17232 bytes
SHA-256: da731e13cc23eca8a50985f4f960bc5b2b09fa6d115525d1a9c20e657fcc1231

Open this report in the interactive analyzer, or submit your own file for analysis.