Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a92c4f5c4e3ea2…

MALICIOUS

PDF

81.1 KB Created: 2021-09-19 08:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 79164e6472375d38db231ebdc1fc4842 SHA-1: 9d50668249ffd2b303c5204b4047fa55aefdfd3a SHA-256: 05a92c4f5c4e3ea2abf208d990c5536737bb314d86a35b2348b2513daccad8a0
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple disposable or compromised domains. The embedded URLs, such as http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f73c52c5b5---lapeto.pdf, are likely intended to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://3dprofi.net/images/uploads/file/xefawular.pdf In PDF document text
    • http://kesifveotesi.com/files/tezubetivagenapisagozuwi.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/98474859193.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/kaziduwe.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f73c52c5b5---lapeto.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/19357822084.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/finixasuz.pdfIn PDF document text
    • https://anglarill.net/userfiles/file/74382925922.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/zagoxapimujukapobesiri.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16144123f347f6---mobopuxomagam.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/1862700948.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/dinoletasuwixud.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/70486325534.pdfIn PDF document text
    • http://kelvista.lt/images/files/fubokudatudasesugib.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/40569047683.pdfIn PDF document text
    • https://mywayrtk.com/userfiles/file/fonasakisifo.pdfIn PDF document text
    • http://gr-chem.com/upload/files/8951839481.pdfIn PDF document text
    • http://chpcentre.com/files/file/5506379984.pdfIn PDF document text
    • http://xibuhuanyu.com/filespath/files/20210903095637.pdfIn PDF document text
    • http://parilka.by/var/upload/file/norekogulaxovokunojar.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/bosekadigigoguvepu.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/27195995709.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/samew.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4f01728d418ecda302b1a50451b4cf9f/zisata.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=what+is+facetime+appPDF 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_off0000da28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA28 17664 bytes
SHA-256: 8d591d1853ad2e9ec2d36450620ed81bbc8725f3018aceb866564e44d50c310e
font_01_sfnt_off000107ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 10368 bytes
SHA-256: ac526a56aaccc1b51b0216db7d4c341943fa9c2f58fd890aaf8e64ce4c0fb463
font_02_sfnt_off00011f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1