Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5d1e8e873e3bd6…

MALICIOUS

PDF

86.4 KB Created: 2021-06-27 17:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 772d7e3e15a7471cccf69d5503489c90 SHA-1: 109fd35f92899366748308840d3979b231745a00 SHA-256: ea5d1e8e873e3bd67e63fbd406a11528346274dfb22ec99051622fffd8bc8600
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs, such as 'https://wastran.ru/uplcv?utm_term=ipo+home+first+finance', are likely used to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://wastran.ru/uplcv?utm_term=ipo+home+first+finance
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084139e0e5de---goniv.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088749deaaa5---rowunubiniwezov.pdf
    • http://fotofolliasanlazzaro.it/userfiles/files/ziledarujar.pdf
    • http://dinskayarealty.ru/media/file/18415295152.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/jr2mhdk7l9qsde6nic286hvb0f/sotuwudazilevexabor.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/3b118baf5f49be6040f14fd7b9f1fc6c/pagopizotalemo.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16073479150f12---33288439756.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/sf7og8buat00ud84fam36o1scn/nakubidubinijedub.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd6721dabe---bavizokasunakazelagow.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160888c4b3f1f1---nakuzi.pdf
    • http://charontrade.hu/data/file/zofilonepiwonodofewira.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/m3ejqesc5ps68p9bi4e5pe75qo/61195209221.pdf
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/59346591633.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/03008a19aaad50f6ffd13c537c8e4a98/marazesujenoguxigi.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/7278969653.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160853a5d52806---jikujipifuk.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/2a031a862e0c8e4337d6c7d7de4e1e94/14694305904.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c9b0d21ab---xaxutew.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/4a724624c50db87a5f139f8ed4822873/dedofatete.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16098b44c4c23a---jexoxizituvabujukojitaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecf5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF5 16792 bytes
font_01_sfnt_off00010507.bin
a4b4ae9edd09ac2b636a0b999f13e674c22dcf19c778903b02ecf6d451f28883
pdf-font-stream PDF embedded font (sfnt) at offset 0x10507 17952 bytes
font_02_sfnt_off00013479.bin
c323bb99aa1cbca304b1e4d6bdfec36636835be17f2aef0e39c65e13189120a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13479 10652 bytes