Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb48a3c7a639ba4…

MALICIOUS

PDF

87.0 KB Created: 2021-08-25 04:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fd5bc609d9ae4119b35589a66dffbc51 SHA-1: 5352963466d8a0f5c3f47481e214d328d203842b SHA-256: 7eb48a3c7a639ba40b484e33768e236e7c36ce2f1ff8cfb87e3f4d738a1b27a4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. The embedded JavaScript is likely used to facilitate the redirection or exploit PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://archism.ru/uplcv?utm_term=define+loquacious+meaning PDF link annotation
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/a9urbmhd06bmd87tur9bl061g3/wexozokasuvov.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/4f025af772da0c8375ede1168d02a212/39751216217.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/9217979823.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4353f7e524---39311159351.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/vobesakuzewifevedewumuwub.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ddaf744539c---labilogat.pdfIn PDF document text
    • http://buckleyfamilyofdarling.net/clients/0/01/017bf228c8331327bdfb67b1798bff80/File/wafokubugoromenimurab.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/823c6d75e6cb74b261f8f4393a52e1b1/konaronuxurigubug.pdfIn PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/86283701946.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/11537731458.pdfIn PDF document text
    • http://packturf.fr/files/vajaxidevilezutomowuza.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/30081396017.pdfIn PDF document text
    • http://lucann.com/Upload/file/zerorovaroxu.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/2398f3cc33127556fc1c5fa697969e52/53421777194.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/32nmovg24nqevrok8lp0omalim/gotiteburokopifuxoritafem.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b438435de5---punijavupiwezuka.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/23aac8e8e218b15193439a9aa5d58279/27125419171.pdfIn PDF document text
    • http://48bulls.com/js/upload/files/82063387608.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/reguxep.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/51672876181.pdfIn PDF document text
    • http://czapla-dachy.pl/public/images/fck/file/98395240204.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/89737580859.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/4foq2aamt1lhdvsbg2gubcd7lm/46839816448.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e21098d472b---74579724700.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B6 18304 bytes
SHA-256: 083eb14454ce9ccf9bc574d3d1d2862570955a14eeee76ba5449577ebc2c273c
font_01_sfnt_off0001081d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081D 10728 bytes
SHA-256: a074668af004bb8147394bd78cbea2ffed3eed6d780fcd77011d0d78a39ff6a7
font_02_sfnt_off00012068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12068 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_03_sfnt_off0001357b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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