Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47120630dcc4d33…

MALICIOUS

PDF

90.1 KB Created: 2021-02-17 00:33:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f88875334a24a2a6183355fb0cb48878 SHA-1: 13b06683779c0683f23e942d5375ef190105a8b1 SHA-256: c47120630dcc4d33c8411ddc3df53b237e85d8a78dca9425922fa9cda569658f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. One of the primary URLs, 'https://bologen.ru/wix?keyword=gobstones+with+ben', is directly associated with this behavior. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/wix?keyword=gobstones+with+ben PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486061/normal_602c480fc814b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_60136c24b462c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476133/normal_5fca2a6de5449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_602400103a5cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427093/normal_601a342a6ffd9.pdfIn PDF document text
    • https://dixetomik.weebly.com/uploads/1/3/4/7/134775969/tedilamojuka_xepekoso_puledulizopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_60226081d555b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472198/normal_5fee31c6e1cc8.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/9465664.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476783/normal_5ff75d08c8428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_601a1beaa40dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505839/normal_5ffe7b159bf22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469351/normal_5fe0508fc49f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470385/normal_602561c7d923f.pdfIn PDF document text
    • https://minunelojob.weebly.com/uploads/1/3/1/4/131453060/minafekuduzedul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fe40b373d9f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wosunitiguzivef.epizy.com/bunion_formation_icd_10.pdfIn PDF document text
    • http://jebefufodapiwi.epizy.com/vufaxawi.pdfIn PDF document text
    • 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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_off0000ff9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9F 6408 bytes
SHA-256: b71bf7faf3a2ce2315c75c81a6c499eeb463499f5945c9b99d2f9af5b1770855
font_01_sfnt_off00010f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6B 4700 bytes
SHA-256: 3ee1d78fd296d909d22230d7fa95218ce54592aaf216295aae9530e92c6d56d5
font_02_sfnt_off00011f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7C 10656 bytes
SHA-256: 5c63e13a5df4a43f365cc6046e2bf6494ee4deb7af1d4a680bf79cff260a2a89
font_03_sfnt_off000143f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F3 16400 bytes
SHA-256: 44f9fd5195cf255265141daa3116ced55768786d3392a002edcbd73ee4379139

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