Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f62cd3ce0a9fc2…

MALICIOUS

PDF

82.1 KB Created: 2021-09-04 00:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ed94c2046ea94fb8dcde36295abb8bef SHA-1: 559ca29cfb26352681b08bfe14f39dbfee8e84d7 SHA-256: c7f62cd3ce0a9fc2dd7026849c8b1cbbd3d4eef0a72e39bf772a3e24b9492cb9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The document also features a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to obscure the true destination or host malicious files. The presence of these elements indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/79c9ccd8827870bc1927e94eacbb72ed/51290804672.pdf In PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d0afd06d3---86643513857.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/magitetogixalozukenuwisa.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/6bb756a71fdbc7e6390f47b93fba70e0/98374748298.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2335b094c---bozipadizoru.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/sajorukagojunujavofodaro.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6f36dc0d8---liburajutiza.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/99245776201.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/44781627499.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/31729267167.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/61843430282.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/pilaxi.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-8-6/20210806230930184007.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/fiwefosofetuvuxenosubu.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/sulapalufigiletewafu.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba243755e5---21553663237.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/47ne73q4d12u5fqqdduiin9qqd/labebaxuminiz.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/21946466627.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607858723e790---46751176909.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9119b2897---senopi.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/bmho6pn63thpjkvdas0hlqk192/fovun.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/10343064622.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/goluvajeni.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160826ce8c22dc---tepesufonutepusunonuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+use+farlin+manual+breast+pumpPDF 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_off0000d923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD923 10836 bytes
SHA-256: c024db4360f86452f011f417e3cf704078596005430b730837cc87ef702616ba
font_01_sfnt_off0000f1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A02 19008 bytes
SHA-256: ccd7ef571f82bdd89733d7bfa5cebc723d8a5ba2a8bbb337b56a3c649230c3a0

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