Malicious PDF — malware analysis report

Static analysis result for SHA-256 7221459cd04038e6…

MALICIOUS

PDF

86.4 KB Created: 2021-09-20 23:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: babb3103911bc7e80bcece3749187619 SHA-1: 023ba3bd0f62b5671c4816098348ac99a73abebd SHA-256: 7221459cd04038e6b3c399577b00ea3849ebb91dd529856cda9662da484d5e06
164 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains a high number of links pointing to compromised or disposable hosting, suggesting an attempt to distribute further malicious content or redirect users to phishing sites. The presence of a visual download button lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://abwfinlay.com/uploads/files/89119226673.pdf In PDF document text
    • http://didongsinhvien.com/upload/files/46024826171.pdfIn PDF document text
    • http://highdesertrent.com/newsite/images/uploads/file/66277031432.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/vizesetekakila.pdfIn PDF document text
    • https://textosolutionslinguistiques.com/upload/editor/file/pevasalimupedij.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/98276443255.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63836676697.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613912c1da24e---doziletufazofaveg.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/jejusuzuzopewum.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161449192ab0f3---89720078165.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/pegowapupakizede.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/8879146356134bdb0c6c38.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/jepisafekegomakobuv.pdfIn PDF document text
    • http://cutskytools.com/d/files/zitapikepavorip.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/zugijigoporiv.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/b2194f1eb005762acbf91eb8788de1b7/xipaxotijufuzibeno.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/97dfc2762d3f81360178ddfe5e1f2e67/fuvogujonemofoseko.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/wuzaropevobalazokad.pdfIn PDF document text
    • http://studioaeditecne.it/userfiles/file/posepomodekeketatu.pdfIn PDF document text
    • http://pentas.eu/userfiles/file/45468085795.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/og00e05huuvddmn45hquocvdm1/zizemesidegegufelido.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/86129374696.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/35272603425.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/9344237671.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/kapulezixarupi.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210913/file/47519856774.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/25827393019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=tnmachi+movie+download+tamilrockersPDF 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_off0000ed57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED57 17468 bytes
SHA-256: 7fbd88317dd9b0b70ecfab5a6a0724fabd1f6f5e523fa40b45734764ca05bebe
font_01_sfnt_off00011a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13292 10840 bytes
SHA-256: 688d6a7bf4bbb1aa7ea33623b891c6485c1cb0e1ae673474d4791dbbf2589675

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