Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce47040d985ce2d7…

MALICIOUS

PDF

84.6 KB Created: 2021-08-01 23:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8da91ee13129ade4febe33a4e5988a01 SHA-1: 98fe2ffaa01074a261f43cb7b62c0754582b12be SHA-256: ce47040d985ce2d75cf71c0e6c90d38224b2be3d7cbdb69c1c3569bfd7a952c2
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which are hosted on disposable domains and utilize SEO manipulation tactics. The presence of a 'download button' lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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://philabc.ru/uplcv?utm_term=free+download+windows+server+2008+r2+32+bit+iso PDF link annotation
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f8f4d5575---zekezixa.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/92234253644.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160729928650f6---37836539578.pdfIn PDF document text
    • http://transsnabstroy.com/userfiles/file/76758232431.pdfIn PDF document text
    • http://wheatland1971.com/clients/25033/File/nudozamuxo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d278df00e3---2530417346.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/83594763973.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/zemedefafimeparutidobej.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/kubipodugod.pdfIn PDF document text
    • http://petswithlove.com/cvsprojects/SSK/Source/2.0.0/images/files/jifafojemimuvedawefuja.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/6772890371.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4a8314f06---fosevefumutixisukiwovalad.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/31681466147.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/82036172194.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/2cbf6d38dc0d4a1c59c41ebaed2f5697/86166191629.pdfIn PDF document text
    • http://arcadia6465.com/clients/f/fc/fcac8d81e62e7f23ed02b02243def538/File/rorowajoduvakuri.pdfIn PDF document text
    • http://selmanoglusigorta.com/userfiles/file/76477794470.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e220a4fc94---xarafodemaluxakut.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160dd997fe89ae---tiriju.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/ca12fb8fcb888a6e1ef8350bc652622e/47924656132.pdfIn PDF document text
    • https://businesslife.com/content/files/74931792538.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/bogefiwabaxoj.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_off0000e603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE603 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1A 11132 bytes
SHA-256: bddbe55c4aaaaa79bf32ddda0c5461a3e15694e3af0dc448929ede0f1d5d3cfd
font_02_sfnt_off0001184c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184C 17244 bytes
SHA-256: 60d5ee2ba10dfc6faeec0c2475ac15bf99cd356dc0ba02d37ef144fdf91f943b

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