Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20884f285245a01…

MALICIOUS

PDF

94.3 KB Created: 2021-09-01 14:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 99467b65f720060b9002941b934d857e SHA-1: 6754b6a899c827768f2686df1f3c389c861b9cbb SHA-256: e20884f285245a018e8c27d32e496e196632bfd9400f327d9655afd2e6074e8e
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or trojan distribution vehicle. The document functions as a link farm, with many URLs pointing to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users to phishing pages. No scripts were extracted, but the presence of numerous external links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d755dee67b8---dajegobi.pdf In PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/6cjr0ucmcruigfvcc5l3ng5k88/jorog.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/92d2a6d2ea0f803dd27983735cb4b528/66738357753.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021510143122521.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/nopesogid.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/94627303831.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/jupasud.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/50514373343.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/jikarasunafigosabe.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/16054792698.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff2923d3bb---61347946673.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/92758513228.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/410ba99a5d5341ea27c449e86103aefa/pikozovogif.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/gezivesabiraponipim.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/vamibibuzikujo.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/8mep1f967h076likb62qeg6873/80445007501.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/90997047641.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/393b2445a4b9175f4dbac64afe994f9c/9361401715.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/88719540806.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/lutokozobewolumafexip.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/xujaxigipuxufufonu.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/rexizotunirelijosivobefuj.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/rugiwafojubekada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=dulles+airport+policePDF 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_off00010c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0B 10364 bytes
SHA-256: bdd09d110dfa10450d6ab80cd952cc85e959abc2143130d3ff85b7176ace387e
font_01_sfnt_off0001239f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239F 18324 bytes
SHA-256: ca2b7d9dfbb003f30e3b31b0760fb9ff9ed0ac51121e8763fda60b8d6e6e40a2
font_02_sfnt_off00015369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15369 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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