Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2c296cc7d418b0…

MALICIOUS

PDF

78.7 KB Created: 2021-08-24 10:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 09204807457c24a3033858c16580994f SHA-1: 16abd19cb07a6fe5f228c66f8e35538cd57a92de SHA-256: ac2c296cc7d418b0eebdde67c8275a454efb339b2fdc7c4e3876a1220dd420e2
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains a link farm pointing to various domains, including compromised WordPress sites and disposable hosting, likely serving as a lure for users to download further malicious content. Embedded JavaScript streams are present, suggesting potential exploitation or redirection capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=miracast+for+pc+download+free PDF link annotation
    • https://tisuputih.com/contents//files/95962071078.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9225f4012b---pomuj.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/vorutizijix.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b55b9a008f---89274003442.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b779581dc39---towewoxomekokuporelofu.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc4798ee99---wunejazalalitexiwad.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/0cfqfd1b2s4eqgaot2se0rclqc/dogetogirazogowalala.pdfIn PDF document text
    • https://vleek.com/uploads/files/dijodojuzikakisirarip.pdfIn PDF document text
    • https://esvigo.com/upload/files/54025550780.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/89088990027.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/nubatuneguvazam.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9fccc0346---83899293079.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ea949aa28---miniwagagepuluko.pdfIn PDF document text
    • https://hgb.se/filer/file/65366285992.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/xinaxafaxijun.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/2be8fa81b60b45e365d24e6342dc55fb/kogosejudezalemokudokib.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/22u8pbld14q7s3esmaoantn2g0/jutaje.pdfIn PDF document text
    • http://htwy.com/upload/file/56529203812.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608c50cf89f17---85582459224.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/142012245294.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/13341105933.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/datupusuzobij.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/0a2985ad67fd94abeb1b345e2323db48/tiler.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/ganipigogop.pdfIn PDF document text
    • http://anmimar.com/royal/userfiles/file/lerozosiwe.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_off0000cfbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBD 16832 bytes
SHA-256: 4d616f85e434026eaf7bfe9f82bd91f36dfb8893091e87181774b9d81e1b11c3
font_01_sfnt_off0000fba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA7 10692 bytes
SHA-256: 227028f12c70a98dc2aca6a52563aa6570eeb86bb9c6adf7de6688a9cf07d3ad
font_02_sfnt_off0001146a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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