Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0bb7bdc446d121…

MALICIOUS

PDF

89.2 KB Created: 2021-06-28 20:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96274aae03e8528b1b151958d0cf585f SHA-1: abe65dafdc0d84acbda7e6e54812142133b0083a SHA-256: 4e0bb7bdc446d1214757c792794f4943bf719a91aceeafdf214f785a2b0785b7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://auburn-properties.com/userfiles/files/94776472794.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0499f60428---vujujegavivevexomotek.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d504de8d3a---57329652594.pdf
    • http://billedbutikken.dk/articlefiles/file/31142649854.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/d66m1jem7g0og5ljb4kavmgb47/werezojusezofubojagu.pdf
    • http://jump360.co/upload/files/20210618142011.pdf
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/kubiguxodibiba.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/12476017191.pdf
    • http://bawaconstructions.com/editorData/file/lesetavepepufi.pdf
    • http://bellsazshihtzu.com/clients/878694/File/gumosenesuxopagabex.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d90d1615d---titarifawojifijide.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a44115e0145---bubus.pdf
    • https://lacaune.hu/userfiles/file/wujewulaziserasenobener.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077baee22244---galem.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/36240723653.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/e2fe60d5fde5de0c1b9d51476071de73/kosar.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac546bd44e9---65991727035.pdf
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/45636959684.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd505359dac---54318885462.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b1d40e885---warofogumilolakexobanatol.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609829f2d8553---tofobiduxopulele.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/7d0261894029f550ba71c0131c055d7e/26312168723.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/1564536633.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=constance+hall+big+brother+2005
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f60a.bin
bc1755c72025e484e0369549b8120533d3a6e9a1a92df489e9b20f25421f2d92
pdf-font-stream PDF embedded font (sfnt) at offset 0xF60A 17620 bytes
font_01_sfnt_off00012416.bin
a74235876d3fc8e1c6fddd60bd0022e2ac351a54fba923ddce216a46a0d4fee4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12416 11056 bytes
font_02_sfnt_off00013dde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDE 16792 bytes