Malicious PDF — malware analysis report

Static analysis result for SHA-256 8876bf0694e6d666…

MALICIOUS

PDF

84.0 KB Created: 2021-09-07 09:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 070e3d65f8cebd343d3e7a8bff50a69c SHA-1: cab7bb7997277a7eda4a051e386a99cebe50134e SHA-256: 8876bf0694e6d666e50f7c51e6c6baa1f5c75a08d2e2cdf7b336a565e64c6402
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be directing users to potentially malicious content hosted on these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://traiteur-ribot.fr/userfiles/file/80520449486.pdf In PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/15807548164.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa6bf09ffe---badogedubumademigulunix.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/17853362041.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb18c35cf5---30698169987.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/nigigumeverigukobaronelo.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/8015161826.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/ruvulelukikonapogogimi.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/98090788644.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607751ae961ae---winim.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/walevibeneluxedos.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec3484749b---luzifegitimufir.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/31fdbb8b5907a6afb155c0b43ac74ed0/23614938090.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/77499732448.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/6tdb705m66vj49q8csej8d3hi7/mobat.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/53632410768.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc02d2beb9f---topekurafasuzo.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b45c14350b---luvovadexobusekewafosezi.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/746299a4a51967ca47f5856ca2d941c8/xutedino.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f6eb52980---52508157869.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611549c7ec368---bojejifopedux.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-8-4/20210804212947409820.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a1bf04cf8---rijuwefibupew.pdfIn PDF document text
    • https://okna-kurska.ru/page_edit/_samples/userfiles/files/2312354589.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609461b5e05f6---87382556842.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=les+auxiliaires+de+modalit%C3%A9+pdfPDF 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_off0000db33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB33 20388 bytes
SHA-256: f6564bbdd2412da9d3070cd65f2ee41fef09a22f082678000aa1d8fd799c9726
font_01_sfnt_off00010f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7D 10868 bytes
SHA-256: a5106540053c86dab327008cbadd71ae2a40162a91e789e711c8e4796bced38b
font_02_sfnt_off0001285c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1