Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d46cd4122d8fcb…

MALICIOUS

PDF

84.7 KB Created: 2021-07-09 14:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 26831114a565e8829b3bb6bf5fc8b15c SHA-1: 6750c7b8e046cd5d46ff573d8a7c1861c530a607 SHA-256: 74d46cd4122d8fcb1a7ebe9dde26a9a9c2463ef37eacd3ed53aa9579305d1915
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these link farms and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://clubsportedinburgh.org/userfiles/files/tetowiserafinarorej.pdf In PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/j4tv64dvtrbh1knarmo5kk59l1/68775823594.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/boranasobatafef.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/vafasurovavizijavifo.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/fizubedebilewetum.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a96c9bf49---82037560111.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070023c77a83---1103146623.pdfIn PDF document text
    • http://cga82.com/admin/File/37496823376.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/2ce0abf0e93e22b656fb1042f3604397/sakojof.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/60804355904.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/e6c8t5dqh5q0aqr3amcdarnbl6/49067780516.pdfIn PDF document text
    • https://4appsoftware.it/file/nesebe.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/42751167715.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cd08c86d2---wemerozibupob.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66d92daaad---zamugegimudo.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/b2f3f21acf77d4205c71108f6a69b6ca/1588360909.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/fuzafubab.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/48fe7901ee3d80b9848800d3b5f4587b/wejigufezixiliwawafanu.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/puvuviwasinuzarebulef.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/jojubebekukipa.pdfIn PDF document text
    • https://hirurgija.me//files/dixelumixupawagap.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/58612cbab9c7b7302afc6e8a4fd45598/66709423248.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=hook+up+song+mp3+download+pagalworldPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/98154deb20eb47ce05003d365fc70ad4/52556686275.pdfIn PDF document text
    • 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_off0000e855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE855 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001006c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006C 10852 bytes
SHA-256: 186d1e16654d0786415e80097b6e2012f7bda340b3e023dba0d6b4116ce4fb57
font_02_sfnt_off0001194a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194A 16904 bytes
SHA-256: 41ecbd0547f81d92e8678486119bada5ae9bde9c8aa3380c47db88054e176851

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