Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee71915eba99b60…

MALICIOUS

PDF

107.7 KB Created: 2021-08-12 04:31:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 39ea78fb3d411352ab33537f8423a20e SHA-1: 2113f03a0029576a71c7ca0013308a61446722dd SHA-256: 0ee71915eba99b603595e496cd2572296b191afbd3c73ab58b8fc73a1389af9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to exploit users through deceptive links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/u6ip4kfb8tt5st68t4q9a5lo5r/21772083196.pdf In PDF document text
    • https://akamercedes.com/images/uploads/files/genibenegapenubugibolova.pdfIn PDF document text
    • http://www.zaluziemalina.cz/userfiles/file/lagezukolopuwajitikuvowu.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/9b82dc8aee0a1c1b8bd0db1477c5220f/nofopig.pdfIn PDF document text
    • http://jar-ted.pl/file/62449393066.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/96463641879.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/jezimudosax.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160df25af581d5---87358873054.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ac1c6312---sajekage.pdfIn PDF document text
    • http://nfc.soo.jp/file/41452045193.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/3655532303.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/zapesaroxoxalozilatiwe.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5bbe09d8d---kitisuvese.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081ad6dac9c0---kaxegatijakanavujepov.pdfIn PDF document text
    • http://gewald.ru/content/Files/lelojaketepaxo.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/zisepam.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/13410778034.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/81732554617.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/togetipajepudawetuwef.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/fanugijufodo.pdfIn PDF document text
    • http://jkphotocon.org/data/userfiles/files/25414562470.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/vujuvipi.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cdee41b9c---xoridajolekopabewixuv.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/91302620056.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160889ee04c511---15191455196.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=michel+foucault+what+is+an+author+summaryPDF 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_off000140a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A4 10892 bytes
SHA-256: 69e7948471f59093c5dd102440ce5f57fc06ab8fa99d50984029e060b71656a6
font_01_sfnt_off000159c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000171d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171D2 17944 bytes
SHA-256: e992e95e7f5fdd914913f92daf535762fe4cc25cb01d7f524ea88b230215aaea