Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9fe6167e37f18a…

MALICIOUS

PDF

79.6 KB Created: 2021-09-06 16:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 6a112d96d2241e4cddc596391f72be18 SHA-1: 4c844883b5c4c4806d361af79865cb8eea3d9d61 SHA-256: 6e9fe6167e37f18ad1f70a667b0897c12b9122b02df9e0bfb1dd362a5b3588da
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pima-alarms.rs/slicice/file/82337458943.pdf In PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b75d55486f3---belozixepodotota.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/31524838350.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/wujozasavufa.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/zemawudunif.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/befigun.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/nuzuninuriloxuxun.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///77389948995.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/vatejagilijinorewotejewar.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/94a076828fca0910878f303838081318/gasisisure.pdfIn PDF document text
    • http://abpaluso.com/upload/file/92789070151.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/21152653449.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/pigetizasarovawixejip.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/84581420292.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/kiwivotajanewuvi.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/88a34412a34f0c2c644798f2d0623caf/60665250676.pdfIn PDF document text
    • http://renknh.com/ckupload/files/33941347528.pdfIn PDF document text
    • https://robertbah.si/files/file/kunovibabekipuluxa.pdfIn PDF document text
    • http://lrpharmaceutical.com/upload/files/96286173668.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c8e07a65---22114927626.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16256521011049838305.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=indesit+fridge+freezer+black+manualPDF 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_off0000d604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD604 11044 bytes
SHA-256: 1d1f769e64139499370039c690ae0413b1ab01c0e3713213915388a4dbca4415
font_01_sfnt_off0000ef89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF89 16280 bytes
SHA-256: 0253d0e1194a25936d2a34c328aafe9cac416af2e9982d3b5b78f6106ac92a56
font_02_sfnt_off00011945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11945 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1