Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f218fbec8c73f7e…

MALICIOUS

PDF

117.3 KB Created: 2021-09-07 20:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7481f56f840db4760df72615606c4c6a SHA-1: 435fc1369fa4cb5d3c3c820f99e342a876a905a3 SHA-256: 2f218fbec8c73f7e84db51d695ef55a2f10ec78ae6afbd3a91e4f64b6099ff0f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs that form a link farm, directing users to various compromised websites. The presence of these links suggests an attempt to lure users into clicking them, likely leading to phishing or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://cructi.ru/uplcv?utm_term=stansted+airport+terminal+map+pdf PDF link annotation
    • https://bonekarusa.com/contents/files/92473147198.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/jitidizata.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/e67f84df01926ab7a770028483658d81/pidavorizulepubowexupavek.pdfIn PDF document text
    • http://sequoia60.com/clients/875776/File/kenizapideverovagaro.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/9009e2449836cfd858c06619c854502a/84120544979.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/mgfc3fnfv917ko36i1nttp5b3g/defawurifal.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/17412269119.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/35780829789.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/rutigosedupelopozada.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/17453554170.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/72353405197.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/79458180967.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///tidorawapone.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/mopemi.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/kiredixuxo.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/sozuxuxiw.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cqj4jtjnqffcck1ucr9am25jh4/vibavumajuvowujoret.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/79941908850.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/5126dd00b5071dd5bb2907c1a02861eb/95396633574.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/0ee745c6319a128e11ecb4e9039e83af/97391510331.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/11185898247.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/dilofod.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19669193143.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/16e789c8f0e5422ba5cffa6d7f57c11f/69143545490.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_off00015e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001761f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1761F 10736 bytes
SHA-256: 0d1547fbf06ec4f5fa41ef0f76c334e5f69e05e7e60f41c6b0dd34c749cc5e43
font_02_sfnt_off00018eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EB3 21208 bytes
SHA-256: d63387193e3c96a953723bd74ded44c723b8210d82390563152a5e6cecfe5503

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