Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c6e0096d8058061…

MALICIOUS

PDF

71.2 KB Created: 2021-09-24 18:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ff7aa306511ccdc39dd9ce64d50369f4 SHA-1: d810ac36734c0134258f34881b0a44c5d298d6cd SHA-256: 1c6e0096d8058061ae64bfa8d1fb109f1bc601d8244ca470d995098470883f2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress uploads and disposable hosting, suggesting a phishing or content-luring attack. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://oniceh.ru/uplcv?utm_term=how+to+add+someone+to+a+group+text+android PDF link annotation
    • http://ztkammer.at/uploads/file/revofom.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1614dc4fb796e3---78319337509.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/91840110925.pdfIn PDF document text
    • https://manenshop.com/upload/files/duzanedatudevu.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/zolojukikiguvi.pdfIn PDF document text
    • https://tele-video.ru/upload/files/wirefupupunonotizupezef.pdfIn PDF document text
    • https://emartdeko.pl/galeria/file/22550753481.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a1118c2df---11345908064.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/visifosisijubixavud.pdfIn PDF document text
    • https://okazionche.com/files/24366516524.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-13-02-04-53-76.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/xabamofusabutoxedipusu.pdfIn PDF document text
    • http://haai.org/upload/file/sixowodararino.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/25436695020.pdfIn PDF document text
    • http://fedime.org/imagenes/12646770820.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/sofameterimubigavuvifuza.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/12929729886.pdfIn PDF document text
    • http://apartamentykunickiego.pl/architekci/public/upload/ckfinder/userfiles/files/pimovirexed.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/30697212375.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c2e388213---disesoluxax.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/97829206332.pdfIn PDF document text
    • http://bamor.org/userfiles/file/72830337966.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/nelenunol.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/42486005181.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/ferisonoguligosumazura.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/ronetuzofukimiragovom.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_off0000b5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF4 15528 bytes
SHA-256: d1c83a95915c79f00e855bafb3e71435c639cfd50bde8c2a9bf4338be0c47e96
font_02_sfnt_off0000f550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF550 10968 bytes
SHA-256: d26d1ceea9a3cb926f791097a98b8fa2f70ce8106359b5d9ca7c4bab5ecae964

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