Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd534ee3c793aeaa…

MALICIOUS

PDF

80.4 KB Created: 2021-09-17 02:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6919a2c5b2622cedb84444cce660c329 SHA-1: 1dd2d04a818cec0a145c805327aa1fdd4a665d2d SHA-256: dd534ee3c793aeaa963ca075ef9bda78cc8aaa2066c4524564971c8a072dd27f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to external websites, including those hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm suggests an attempt to lure users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://thegioixedap.net/upload/files/71440291860.pdf In PDF document text
    • http://grabnerestriche.at/40044513399.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/72169267361.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/vevizikemaf.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/ad9114cd34580e15072697c9b0e99acd/62566013378.pdfIn PDF document text
    • http://chinalabware.es/d/files/fulofuwitifu.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/gopetira.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/94275668434.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/genunovidav.pdfIn PDF document text
    • http://jonme.net/ckupload/files/mowudinisero.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac6be95a4d---pedobinejupusisebetigob.pdfIn PDF document text
    • https://flims.atelierleuthold.ch/userfiles/files/taxuv.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/b0b6f0f740051b118a6efcdeea0a851f/togawiputipovozi.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/zositudebidizefasenagudo.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/desusuradaneronawekisuzot.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/8af9f884571e118a9c264822b5f2e93e/birugetaduta.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16142e41426a87---fekugufubofefijibitur.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/sevewefojewimozife.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/nosumalirakikerokopomole.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/8464560816.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/nopotoxu.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/36301078298.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=best+android+audiobook+player+2020PDF 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_off0000d312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD312 18200 bytes
SHA-256: 02e2a04730c724e4121580ff252dfb5cda6fdf13035529369361da2cfae8209b
font_01_sfnt_off000101b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CA 11128 bytes
SHA-256: 57c9532c632a248cac7832d7616489239c8d342897c8cb0149f808608c4049a6