Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc2c9eff3002ad4…

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 23:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dbb484467586ac99fb86f1ba1cf03ea8 SHA-1: f500343ad34702ce77e6b20949b15c1a9e65861b SHA-256: 2cc2c9eff3002ad402845d691051c9fdce8a0b11b6aa576ead4b2fffb8d440a6
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external resources, many hosted on compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a download button lure further support a malicious intent. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=toyota+avensis+2007+workshop+manual PDF link annotation
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/nopanapisofinanodamike.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/l8kom9ilme1m918hsc1b4s546e/58981605300.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/vqu04167c6v53q6021ccnni2c2/polikejanuwononukuxer.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/68e661d68430e7013c302cc51033f921/vujosawexowema.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/54593313797.pdfIn PDF document text
    • http://phunhai.net/upload/files/36508313645.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/lalefedupoviwaf.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/faxuzazexifaxevosawi.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/22646997685.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/68871745177.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/gizow.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/31248588012.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/snadcmgrjgpmjpr1k3f9ebmqg9/jumawiginekepaturuxodof.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090997651b6c---jidugajukovuxowomogesanab.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/baf9b2e09e8664f830afd83c30b489a2/kaxuponuxejuzirasajilume.pdfIn PDF document text
    • http://shiksha24.com/userfiles/files/29794323253.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160940fe16b467---19835743239.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929394e41a1---6637525174.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f77bda574---kabibupewepuwarunetodej.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c22b5fa51c8259f6467927eedb434457/99919382480.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/65476951549.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_off0000d383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD383 11228 bytes
SHA-256: 59372239f14c04becf23c1ffaf95527eb43e7cbdb06a99124ffa2ca512b462ad
font_01_sfnt_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 17620 bytes
SHA-256: 7d29cad967f3aa178634599ee70fb38f4c00e71a0c570efabc456675d0266894
font_02_sfnt_off00011b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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