Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bf27260fbb3beb…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 09:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2f90cc5d09f6e66001a3284cb9f46747 SHA-1: 0985be237561bd6024f959d534c492e2eb833029 SHA-256: 32bf27260fbb3beb237c50318170aa49c3eda5b012526ab9d849a7b4e7434c1d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting, likely intended to lure users into downloading further malicious content or visiting phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of disposable hosting and UTM parameters, common in SEO-poisoning or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/gme77c3mcm2btisaae3a0c3j1v/23364395863.pdf In PDF document text
    • http://hzbmsj.com/images/upload/File/jitod.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/xomiveguka.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/18929029793.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/96622610485.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/delesogip.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/juwogagu.pdfIn PDF document text
    • http://jiachuankeji.com/upload_fck/file/2021-9-1/20210901161003977286.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents/files/45804485326.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/fezenabilosowewevavirogul.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/40207901389.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/92421759106.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/ganosezedavi.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/80513310481.pdfIn PDF document text
    • http://agavietnam.com/img/files/sanubonebujupin.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/73049509465.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/161400c0dcaf00---64989358761.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/59667241875.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a20af818ce---61177940883.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/73807357551.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f08eec07ba---puwivopujesopatinowewa.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/wiwagutikiwelusa.pdfIn PDF document text
    • http://tg-focus.ru/userfiles/files/15066466322.pdfIn PDF document text
    • http://harlit.com/upfiles/file/72724399922In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=best+editor+apkPDF 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_off0000d74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF65 10380 bytes
SHA-256: 789762d018b45de7737d875944120e29bf9bee0573ec901144c3397637d3d7ea
font_02_sfnt_off00010710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10710 16924 bytes
SHA-256: 928d9d8db8439acba4e9db62b352b234944be4447c8e654590829f4823a1f1b4

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