Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab7ea02c871019d…

MALICIOUS

PDF

83.8 KB Created: 2021-09-19 16:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 049f7e233242897e7259011ec8ceb6b2 SHA-1: 41eb7c8671e3c8fa8e39719ae4f59e187f475374 SHA-256: 9ab7ea02c871019dd6efc5457ab60802690c6f74c528c69f63c38c4a952bb474
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=os+13+camera+pro+apk
    • http://robertoantoniz.com/resources/original/file/larobed.pdf
    • http://nghieuphong.com/upload/files/vutadexidogojaku.pdf
    • http://pi-consulting.ch/download/40331341343.pdf
    • http://nppgursaraijhansi.in/ckfinder/userfiles/files/jepodifewasirigawegaro.pdf
    • https://floridahouselottery.com/test/userfiles/file/40990636758.pdf
    • http://banlinhkienlaptop.com/userfiles/file/monas.pdf
    • http://neoclassicalmansions.com/uplds/file/66493396746.pdf
    • http://tuvantindat.com/uploads/2021-09-12/images/files/93689151077.pdf
    • https://kvzriu.org/images/file/80302512948.pdf
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/0d785ca97fd0c2de66dc22ec44ff5a4d.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140d58a6a0df---76327783786.pdf
    • https://brianspradlin.com/userfiles/file/50351735788.pdf
    • http://shouce-image.kuchuancdn.com/Public/resource/files/65258852704.pdf
    • http://vom-ragnaroek.de/uploads/file/xepigemefaduzadu.pdf
    • http://tlw.ro/UserFiles/file/legozivef.pdf
    • http://duszek-lasu.pl/userfiles/file/75554997201.pdf
    • http://1-sanya.com/blog_images/blog_/file/43160713429.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd64f47a0e---76236716045.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e678a0f9e---badoxivewajolosifapaxe.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ba0cf31ae---81048543674.pdf
    • http://photo-preiss.com/upload_files/files/lexetonawuxop.pdf
    • http://www.leasebridge.com/CKUPimg/files/xijimigujosofuniranide.pdf
    • https://vpmemorial.net/images/file/kivumetes.pdf
    • http://carbonelite.ru/file/zuravexovopeputupus.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_off0000dee7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE7 16792 bytes
font_01_sfnt_off0000f6fe.bin
c4921544d64d6fe7c81bba994e364b49a72648d65221113f1d1dd8b6a5d2f03a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 10536 bytes
font_02_sfnt_off00010f20.bin
70f3a7a1b75576be68cff979e76c7937cea80a5453c35962b829e736e8041adc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F20 19120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.