Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e22e6430cc02a1…

MALICIOUS

PDF

92.7 KB Created: 2021-07-13 08:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4747d44930cc9c3467196f42bbe32c9d SHA-1: ff5c8fb2bd10f6358696619d46656925f15b1797 SHA-256: 61e22e6430cc02a1f9db87d6ebfb665ccab6ad2be1211e0d971d90a8cbf025e9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other potentially malicious sites. These links are likely used to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/c899af140d3a33482f40df4ba8630f95/93732713026.pdf In PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/e78f989c12be03b2f1f50fce5ee95c23/dagom.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/25022894645.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021052215242920.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210624_537C1AC9FCF05DC9.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/fd318a714569f2269adfdb93009dbcbb/19530732201.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b619da24b4d---nufoxe.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/1b47ff53bb688136dc49ccdaccfd010b/74032273501.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/72046775531.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/zozolulezutogupobivejaza.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cdc5bd0aa---pavitag.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607247533bb0e---73445440162.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/4f252df16ee26255e5ba1326a9f26bee/66531358891.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/xerugosudajerememamowaj.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/narirorojodukanaxijoko.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/85099968403.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/3496d9a22168b9d52c6e3bbbbb107a5c/gabekajavulasufutilu.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/31c7888daf7e630f5ad945c0befb93d5/51843375846.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/679a618812bebe5443b54013a682d4d4/bopezitonikugepuvoxul.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2aaf8b1522---45562308324.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/72116936661.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=peri+from+little+mixPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 16884 bytes
SHA-256: 98203c5675cbca690a96b9f315a12e3d9ab907212175fc5e0702f9ddc726e3d4
font_01_sfnt_off000103e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E8 19916 bytes
SHA-256: f7077aee6b6c30812fb78242b997d9f2c2d90625aaa8cf4f476a04337d731722
font_02_sfnt_off00013580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13580 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D97 10044 bytes
SHA-256: 999305be96bae77f1e4b8657182ac3b9680914805249b68c1778483bd60640a2

Open this report in the interactive analyzer, or submit your own file for analysis.