Malicious PDF — malware analysis report

Static analysis result for SHA-256 862a207943cc348e…

MALICIOUS

PDF

154.2 KB Created: 2021-07-08 12:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 291e0c188b104feeea706354c922d113 SHA-1: c2125f04fbc4448995b6cf541fa4c2bc6a2e0231 SHA-256: 862a207943cc348e380d679d43b9aebdf9fe818504eb70ab5bda0a8e2795419b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9246

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://aquafilling.com/userfiles/file/ropegolepekikin.pdf
    • https://ceccarbotosani.ro/userfiles/file/70542266110.pdf
    • http://anthonyellisonfamilyreunion.com/clients/f/ff/ff850d76676c1858bf5e443b7a907d3b/File/89238879286.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/99dd0b0641425297986f03048b5874ed/64495736367.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/kuvobek.pdf
    • http://sungsam.net/userData/board/file/7887935486.pdf
    • http://aimic.com/userfiles/file/ruzari.pdf
    • http://boxerdapolenta.com/cmsimple/images/file/gesenavateratotip.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075442118622---98230929301.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abfda031103---sukemiwe.pdf
    • https://aprilboya.com/userfiles/file/tufuburelodawodad.pdf
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/mejagalixujo.pdf
    • http://bjsprt.com/uploadfile/file///2021070202005329.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/ainh2r4qk0vpnc659ft3bqvplt/51124202320.pdf
    • http://soft-pro.hr/upload/datoteke/roxetugin.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075643781a4e---geredutajiwif.pdf
    • http://apexnepaltravel.com/userfiles/file/99959352809.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af71ded82a---duvevevobunoxipasub.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/8c91sfa233eilvju0essru45kv/dimifilemibena.pdf
    • http://bensonlandscape.com/editorData/file/supuxodun.pdf
    • https://avvocatoboretti.it/file/20689307417.pdf
    • http://ccswcd.com/userfiles/file/nudikofafikipusekitasa.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707aa26b87b---44314366600.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/biifr3mig3d5o23qt8l23qcc3p/dowewef.pdf
    • http://dok-vo.ru/userfiles/file/42331310760.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b4be4e8892e---gobanowirus.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=the+tragedy+of+macbeth+act+2+answer+key
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001eb19.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB19 16792 bytes
font_01_sfnt_off0002032b.bin
59837a51cf3e0b6735afa208dc5a8a2adc5a727690ef52b95af49c5b8e7aa8a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x2032B 19028 bytes
font_02_sfnt_off0002351e.bin
cc667dd677ea163db311bb612014c0e9e760a4467723b5f468a8a602b145dfe8
pdf-font-stream PDF embedded font (sfnt) at offset 0x2351E 11300 bytes
font_03_sfnt_off00024f76.bin
c873dc56a92632a97f12f40e5e5d108ac8afe66aed6bf66f05826e6b11736d27
pdf-font-stream PDF embedded font (sfnt) at offset 0x24F76 2580 bytes