Malicious PDF — malware analysis report

Static analysis result for SHA-256 a008c80f9b9cff0f…

MALICIOUS

PDF

89.8 KB Created: 2021-07-04 07:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5307eef79d6b68017c5b7a6140cfaa2e SHA-1: fc49c71bf12ce92d3658e2a1ec7d0fe8f8187963 SHA-256: a008c80f9b9cff0f840fe9b733a06075828882a2d789483316a2f30d13770c62
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/p8jcs5ifa6jvp0o24aj8643of0/86184450147.pdf In PDF document text
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/lepuren.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/bafijekaze.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078b92353267---piduzivigatimuzowep.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de5013c07d---44048604802.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/jidepowogazodukaleposex.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/93524224325.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/76161475576.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/zegadudurita.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/d7834a651452dbdb4a200baccd2d16e3/doxafavidubomeberixa.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/46579585258.pdfIn PDF document text
    • http://kasargod.net/uploads/file/46165828708.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3408fe0dcf---tovizugibumazado.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/pe6t34ttp7jdpq42je83v9iib1/58391384334.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/25733888406.pdfIn PDF document text
    • http://taitung-house.com/CKEdit/upload/files/91630015565.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/zogulajesonozasite.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e955791bc---zerabebebomiwerodal.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/bhqi8aiefccen4t9kba78nm9k4/dekojileduloburaxewuwirig.pdfIn PDF document text
    • http://drshapard.com/clients/73598/File/42928158841.pdfIn PDF document text
    • http://atya.eu/files/file/60901849530.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/tesuminufafusap.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/ae54d2c8a053a9de026698d7d4de75cf/72018788545.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/83763261199.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a025eb5a129---97612295144.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=diet+and+wellness+plus+access+codePDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2C 2260 bytes
SHA-256: 2cb5207c1040d892c7697a0b91235ea9d220a3e37c519cf2f5874a37f29aecd7
font_01_sfnt_off0000e507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE507 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 16084 bytes
SHA-256: a79c9caf7d9fe7d7e6557dd08284a48a0650ee9668136fadcfdab94fba17ddb2
font_03_sfnt_off00011248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11248 17040 bytes
SHA-256: 90faebe671928694ff9f9c4bea6549e68e06c1b9edecbb265c1fab3b030479f7
font_04_sfnt_off00013e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7A 10596 bytes
SHA-256: 68fce6f1e6035c03232684570c5e6c456d10e8356aa9f05076ca2b446d667b79

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