Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc012f00ecd723e2…

MALICIOUS

PDF

80.3 KB Created: 2021-09-15 16:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 12f1555b7ce1106ff8e983587dc2aa36 SHA-1: 839e3bd9768f7013a31b4f67046cc62fd3c13e8f SHA-256: bc012f00ecd723e2b057ada3313f86a5c1212518d0b6ff72e6ca2ecf9668572f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload storage, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://wastran.ru/uplcv?utm_term=app+similar+to+cinema+hd PDF link annotation
    • https://membermimpi.com/contents/files/vujadipo.pdfIn PDF document text
    • http://come2menorca.com/images/file/jimugatarelofijava.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/dujivosuniwuva.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/rapupudifesivaxupodow.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/8448a7ef8fa4ad201c94cada1ed0ddfb/giwuxamadujawesaxogosam.pdfIn PDF document text
    • https://zenithservicos.com/userfiles/files/92842586364.pdfIn PDF document text
    • https://oolong-dining-co.com/webroot/editor-uploads/files/wonazakiwepabogego.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/nusorufuju.pdfIn PDF document text
    • https://keyword-lda.pt/site/upload/file/61831765016.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16132080a677af---91309199611.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/28628387a4f07ce1733e80f844425b93/latoroketaruwilubaz.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/zixalerarubuzezamujovikaw.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16140cd0f4b12b---tibupujuvelixunatima.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/meriginuwafepaje.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/gipelilazevogugupixoweku.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/7861252861.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/42173921406.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/liradefogibaxe.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/18313395288.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/lexigazafukone.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/lanulolunuta.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135cb03c2e36---44763953909.pdfIn PDF document text
    • http://fusiongrup.ro/userfiles/file/lekufevunelulofoniza.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C1 10760 bytes
SHA-256: 79579e2d26e1092e12cabf294057ce77c8f8c06b8e0feab687279599316a2df6
font_01_sfnt_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 17380 bytes
SHA-256: bb6805491d46899de825a2f4205160c70fbaca8a42807802438c3284fd8d92ad
font_02_sfnt_off00011bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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