Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09f3e33b011411e…

MALICIOUS

PDF

96.8 KB Created: 2021-06-27 22:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c418d626249329ff77b00fef1a1903aa SHA-1: 550cf12e386cbfaa080dd5a88354dd9db35e973c SHA-256: c09f3e33b011411ed128118fdde404bc7d6a1c8278d2a88fffe863537cf19b86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/f27c5fbf12500c80c027a60eaf0d2eca/jejixuxifakuri.pdf In PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0d9871610---ponugekolibajeluxe.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/pomoxetegatavavaloj.pdfIn PDF document text
    • http://svx.su/ffile/file/zedodokekaf.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/880e88a16f4e29b7dcdfa1bc51079555/26263657465.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/vofikebubixoputil.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/dejidedosofenezedix.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/65064380256.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/2df26ceec5dc05820c8cae3edaf014cd/nobimurubelitijarokam.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085a788902e3---93940230120.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/botubivum.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/db025623f831f8372210d640d301473f/tibiwojepipefudiledew.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/lasate.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/96009520790.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/vuwetisuxarobo.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/63061e24e28522f8c554a40f4534a766/fogejesujinaratusivipuw.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607086798b97b---dujojuvalafedesavalu.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/benajuganovujaluwajarase.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/c58ce8a113ce67bd64e4aab3aac412ab/mipusexelijilozemug.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090014657c7b---18202142973.pdfIn PDF document text
    • https://avenue102.com/uploads/file/19477172455.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/c06b612ad4cf6a5a8e98ba5a563ef119/8424822361.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/2c1de0ffccbdf79beb8d650f008ed824/59176062021.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=the+giver+assignments+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_off000114c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDD 10808 bytes
SHA-256: 0dbe6d1d1ba7e112a383099f27598a388e82a690fcc1b3b275dfd702abba4688
font_02_sfnt_off00014568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14568 18572 bytes
SHA-256: b8ddd756f1085797c2707d397c3db2f8e853ff0038e60ad365a91dd38fe55fcb

Open this report in the interactive analyzer, or submit your own file for analysis.