Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62349a860b13ec1…

MALICIOUS

PDF

76.1 KB Created: 2021-09-27 01:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8abce816baf1f90bbc9db92cd6e79e4b SHA-1: b0c5f28e1521696490e41627d8e95701739083ab SHA-256: c62349a860b13ec1f5c3af2e24bc259f2cd49eb5163ca4f9e5cb8290900571b5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many pointing to suspicious domains hosting PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to exploit PDF vulnerabilities or execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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://antasboru.com/guvennet/resimlerfiles/91326865771.pdf In PDF document text
    • http://nenkin-t.com/upload_img/ck/files/tugogapibabowegavo.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/26409399894.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/48581770785.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/tifovinarotalid.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/30029190080.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/51219288751.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/kirutemiwelezubax.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb4d3ea370---xobebedigebulogeteb.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/20890584286.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/gesuvinarusikedevupezo.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/koxasurefafuxik.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/lonemifepazu.pdfIn PDF document text
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/juzarutatiwewunir.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4ddb2d4ce---52924175668.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/62532867230.pdfIn PDF document text
    • http://pk-rowery.pl/user_pict/file/dawupulapademisoxilog.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///41925869150.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/rawarokadagavinavizanopo.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/59277850789.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/liwotozubimamawifoboten.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=best+sat+nav+for+android+2014PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000beeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEB 18896 bytes
SHA-256: 659cbdec82ac9d41d070be56a0606d548efc0a723f4e7c18053a0a723aecb6eb
font_01_sfnt_off0000f025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 10792 bytes
SHA-256: f6857317f3e37c3e95654df5f983ec4839fd4955fe987b4e7d1c28da1576361c
font_02_sfnt_off0001095b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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