Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd6980bfede7386…

MALICIOUS

PDF

87.1 KB Created: 2021-07-15 21:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3d873751684272824de6cbca2f1a1f7 SHA-1: b081c7e8d5e0e51bfcf73867c842b3d8d1844f88 SHA-256: edd6980bfede73865b94247cdb0822b4bfce603834a19dab76c23959a10b41f9
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised or disposable hosting, likely intended to lure users to phishing sites or download further malware. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt at SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://28777886.com/Lpf/UPFILE/userfiles/files/9788678729.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/cc89512e4f164bea047808de10c30062/nezupa.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/d01ffeb178a74390596e3345d173ca2a/xuvenibawemubixagul.pdf
    • http://allg-gyn.ch/userfiles/file/74080136960.pdf
    • https://777mto.com/contents//files/madeleretubawuwebujijej.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/th0vcl4ta7rh482lh9jibkc1d9/mipajevusaweb.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88e2b3a1a---5992746114.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0e635fc55---vobifatir.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b63c52b4306---fixigijulo.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084215f4a61c---22708806263.pdf
    • https://amitadevnani.com/userfiles/file/fivipixesamadagu.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/457fa0efdbf466b1a67816353c896d99/liziwirefafotojikuvopun.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/2205dba13d38dc7df1de2619042f84ea/dobalajim.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607032bf7acec---4341085739.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/93a72a2c7cd022c4ccf8f5512a9c78de/34382344948.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/cf4c253ea7eb676a6f7c61d61472d878/24262575811.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944c6bb2904---25826020871.pdf
    • https://detector-billetes.com/Imagenes/file/94071774444.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a197a0b44a---goveminixawusex.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/20ps19rgoh8hljad2qik3la1ac/zutoxopadunelu.pdf
    • http://www.masozilina.sk/ckfinder/userfiles/files/63072141918.pdf
    • http://savitapiti.org/ckfinder/userfiles/files/9901391148.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dfe79ae8643---26509511229.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=chemical+engineering+interview+questions+pdf
    • 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_off0000f057.bin
1bf502b5b5403886806f02bc3cbb1cdbc77ceafd95d641a0d64ff7e3c9b127f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF057 11496 bytes
font_01_sfnt_off00010af0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF0 16792 bytes
font_02_sfnt_off00012302.bin
0e0e8af437dc48df4e4e18a48497998e851237f00908e8fd0ffbc708590a4bad
pdf-font-stream PDF embedded font (sfnt) at offset 0x12302 16496 bytes