Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e115d3c546323bc…

MALICIOUS

PDF

104.5 KB Created: 2021-06-26 20:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 766f5c5cff14007781cc078e5e09cf3f SHA-1: d3f3b796bdd4915a80dc19258352d8ed73b7ce69 SHA-256: 6e115d3c546323bcb04768dbeb8b94b01c8d02e12747e5174afb07726a307de0
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is unreadable, but the heuristic findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/cbam2mu7tt5t8rcqvvn03qc4o3/zatitagorugo.pdf
    • http://mg001.cn/upload_fck/file/2021-5-13/20210513142616683653.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36b77c003---30727186919.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe51bb775---lusotukol.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/09368a7dde1d2f1e575ca8d9b0e40ec9/roxafosiri.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/m4dpvch5h6eo1fl9caleunsin2/kisofuzumavavafasuta.pdf
    • http://magnumprint.ru/upload/files/tasezuguguvo.pdf
    • https://bloomeng.com/uploads/rebisadu.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/6d731087669f772d0da47fa80c81b199/lovererovedosiporata.pdf
    • http://location-appartement-venise.com/italie_documents/files/94680667724.pdf
    • http://amdind.com/userfiles/file/82321443664.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/db956199801078d414318fa95c68f5c9/dabesizodotesusuxig.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/c16355c4596df356f5ab0ec23388cf00/nimewikatoguvasoweleza.pdf
    • https://aimara-bg.com/userfiles/file/dusonisipazijap.pdf
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fonoxatifizemububip.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160775c7114e79---67897032376.pdf
    • https://gites-les-bardots.com/userfiles/file/93717412685.pdf
    • https://pasarantogel.com/contents//files/71747434253.pdf
    • http://vds-construct.pl/userfiles/file/zadituf.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4763d66a7---72350652273.pdf
    • https://kermoulin.com/userfiles/file/58284691903.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873297430d2---xipopud.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2af26d65ec---zozunafojawakexuvig.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1dce79796---wisifopubufefakigosik.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe2f45cd27---jasaremixefodevowiwet.pdf
    • https://lesura.net/userfiles/file/pusuvitemutata.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=middlebury+college+football+division
    • 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_off0001356b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1356B 16792 bytes
font_01_sfnt_off00014d7d.bin
dfb2aaca6f511c055462cddf242edf12f255486af2b1ae5b932b691078e7183f
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7D 17252 bytes
font_02_sfnt_off00017aae.bin
c27488fbb3f943f95ae84d3d44f15c516b2425cd53112dd0a74c8fa3be8f9459
pdf-font-stream PDF embedded font (sfnt) at offset 0x17AAE 11064 bytes