Malicious PDF — malware analysis report

Static analysis result for SHA-256 938095646282ae82…

MALICIOUS

PDF

80.3 KB Created: 2021-08-28 14:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 52532267d56acc708e121f88e2ca4288 SHA-1: d5d5312095409c134d232fae9ed4dabb3d3b8045 SHA-256: 938095646282ae8220a4fd9fa676819b3c03f373fd72205bc0e2f96c703038d9
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=monica+why+i+love+you+so+much+mp3 PDF link annotation
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/07d4c6f14451efd36dfd12ba868766f2/sewisiwak.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/disawezetobeda.pdfIn PDF document text
    • http://guowangcable.com/d/files/lodewalodovarubezexoj.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/b6292e90bc5ea7bf0502cda5128ffc4c/66181874973.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/540a3e6c82645e77cafc071552be5c34/50333974112.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16083bcca08a7d---zivifaresikizokela.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/roziditixedafuwojezal.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/82728778480.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/vosijobi.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b46985d60cc---fawetizepukapakawir.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44cc526a02---56488025671.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/44739546830.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161077b69d0c9c---34078733400.pdfIn PDF document text
    • http://xn--2e0b95unoa536adofm5h.com/userfiles/file/42799555632.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/40507506359.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/e1sib6h4afangdp6ln4fvucoos/86670386470.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/79135b83da81b9f2af8672c2c1ffcf7d/megajo.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/42657948494.pdfIn PDF document text
    • https://digireg.cz/upload/56945237005.pdfIn PDF document text
    • http://bdsductri.com/upload/files/41110863291.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/51881523592.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/dipok.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_off0000d14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14D 10972 bytes
SHA-256: 2fe8110bbeae24b9e86e5dd612e8f63626e90265083a28fb1a886886b63f11a1
font_01_sfnt_off0000eaa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 17876 bytes
SHA-256: 6b90e95c73bfc21f15b0222a5f5c243e8494f2fc1a26261ac3f8627f8230eef9
font_02_sfnt_off00011903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11903 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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