Malicious PDF — malware analysis report

Static analysis result for SHA-256 230414ac32be7e80…

MALICIOUS

PDF

104.4 KB Created: 2021-08-27 08:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c84be596426987724e4c9491dc6836ab SHA-1: c77ef413a28f415c5067671a9a81550cb2724a04 SHA-256: 230414ac32be7e803b7d74cc4610cc2ab78a6783c34319f15adea9d1fde8c1d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm for phishing or malware distribution. The presence of the 'booster driver crack' UTM term indicates a lure for potentially malicious software. While no scripts were explicitly extracted, the PDF structure and URL patterns are highly indicative of malicious intent, likely involving the redirection of users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://inwebjor.ru/uplcv?utm_term=booster+driver+crack
    • https://artasedanasingaraja.com/uploadfck/file/tozifawexo.pdf
    • http://funkyspa.net/ckfinder/userfiles/files/47217868090.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/bpo3bt42s35e45qna1kr5man1t/94771926712.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff12fda6ed---joluvifupuvavove.pdf
    • http://abogadosaguilar.com/ckfinder/userfiles/files/pokimazojenunizoxevi.pdf
    • http://hodori247.com/uploads/files/73733125459.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/77fb794a5469b0fc54ba2bbe2c97c289/15588394456.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0e041a0bf---xaratar.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/454dcd091e87f7f6993f3f965a2f04db/zigafefuxawanu.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/a53369305bbdee1e8d9309e4378822ea/48999404619.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1611eb6f0360d1---87711308642.pdf
    • https://watertorens.nl/userfiles/file/mutaperepabupumokeba.pdf
    • https://ashleymongolia.mn/uploads/files/77961445497.pdf
    • http://resortcrimea.com/ckfinder/userfiles/files/vanapavanexolilopuxon.pdf
    • http://architettoangeli.it/userfiles/files/wokosoxisipujilanadexusog.pdf
    • https://victorybear-info.com/userfiles/files/bafupasebib.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c4425ae8aa3---93236949574.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/jnfmgmobkqqnhsrio362qt9eko/17449200427.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/01225cb069083d746bf275f2bc11c80c/83436052960.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa03dba9cd5---basoruset.pdf
    • http://vdadanang.vn/app/webroot/assets/files/66910782148.pdf
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/74181030219.pdf
    • 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_off000136dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136DD 16792 bytes
font_01_sfnt_off00014ef4.bin
f1fc3e52cfbe25d85476f4d36b4fa921f82161e1d080858f81882be99d834e14
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF4 10424 bytes
font_02_sfnt_off000166d0.bin
a2c00d0fac4bb8c4f8e8946451182f4111a13c5fd3d8998bc3aae56489fa9d13
pdf-font-stream PDF embedded font (sfnt) at offset 0x166D0 17508 bytes