Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2f70673302ba45…

MALICIOUS

PDF

88.2 KB Created: 2021-06-30 15:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93c4cf95c414aa642b903d787c2d9148 SHA-1: 7bdbd9b75281f88d0d8d423d481002a92fe226fa SHA-256: 5c2f70673302ba4520a8f216fb83325d1922278a2bb11f85db83a615304f463a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and link farm patterns, indicating an attempt to redirect users to compromised websites. The presence of multiple distinct hosts and the use of UTM parameters suggest a coordinated effort for SEO manipulation and phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://inwebjor.ru/uplcv?utm_term=deool+band+2015+marathi+full+hd+movie+free+download+mp4
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/de336dc485c65a76087e7bf27baf8399/86708782925.pdf
    • http://bluecars.pl/userfiles/file/vitozegirafemekomavutazut.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094940c85580---44351482380.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/cac95e754ec914700c53ec4772896f0f/zefetalaxu.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075215883e25---xerufino.pdf
    • https://argumentua.com/i/file/21088819152.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fa315ee25---57113004572.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8372d90d5c9592745f72e0cfdbf00c1c/guwirusirunanebetepususu.pdf
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/75434281411.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ht57nsfkj65rvle2iobb0sh7ih/jirosow.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/b7bff91c510a97e67a7c58d85a9152e4/18862546049.pdf
    • http://mwflower.com/upimagesfile///padasol.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/9d9f9c411b69c6db2135928302b77005/musowusalaborufafupewukev.pdf
    • https://djennebeads.com/nbloom/fckuploads/file/darezapa.pdf
    • https://my-natural-style.net/upload/files/10820087464.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/qg9q032i6itfhvdj8b0vctp1f2/67298978067.pdf
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/75902356517.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3abb360480---vusobogowovipevoxowu.pdf
    • https://edusfera.pl/upload/file/venadex.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/asqmg6nl8m9ch632bl2j33q7st/pudira.pdf
    • http://lamekatus.ee/uploads/ckeditor/files/mivatak.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/b188d685035b7b9e27c9950505d6f53f/tugavotiwomakatopafelud.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/n5t74c9mqimrlic5sfgen481ii/luxuk.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/v1gjlr685q7u2im8nsvhrp6ilv/pefinatebefenotogikiwarux.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_off0000ed2f.bin
21398aaf15d0abc202881ab36c757a0cf570b2df5bac3a7a5e374a3bffb3f8de
pdf-font-stream PDF embedded font (sfnt) at offset 0xED2F 11492 bytes
font_01_sfnt_off0001081e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1081E 16792 bytes
font_02_sfnt_off00012030.bin
06025b9523490ad151dbfb8a1a8853c8c6f15c36b519cece09e690ea6256ef84
pdf-font-stream PDF embedded font (sfnt) at offset 0x12030 18752 bytes