Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf64e560bedcc2d2…

MALICIOUS

PDF

68.5 KB Created: 2020-12-18 11:34:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4773c52896ceaca7f2b55b91b8bd4a8e SHA-1: 98a802c98ee4e4059a0ce218a072142d4aba752c SHA-256: bf64e560bedcc2d2f608bb02e91012d068df3aaf8d012f6333f36e3e9649e339
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. The ML classifier and ClamAV also flagged the file as malicious, indicating a phishing or trojan-like behavior. The document body, though heavily obfuscated, contains references to security software, suggesting a potential lure to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=avg+internet+security+antivirus+for+pc In PDF document text
    • https://sodukosikel.weebly.com/uploads/1/3/4/5/134598711/xutolomomove.pdfIn PDF document text
    • https://tojetipa.weebly.com/uploads/1/3/4/2/134234581/vavilib_pumebu_dotoposolufiwa_nusire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf86e8cb11b25c09b9ff8/1606219887247/wood_stove_fan_no_electricity.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfddb5147b14804f90714/1606286840593/community_circle_questions_for_middle_school.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5533cd26ff1194f914669/t/5fc82e27094cf7617db70ee8/1606954536770/49823931832.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/gexirife.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/14852072738.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9e3bda9c57a97be47bf/t/5fd08273ef76c20f2d4ac00c/1607500404590/72263616668.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc71c8d9d43d906ac0bfb3f/t/5fc933ecb4c3b1227b489dc8/1607021549611/10429140810.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf573671f6413cf54543de/t/5fd62d1a226e9048faaf873e/1607871770664/zopawakapemos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29ae41c8c7413143cd114/t/5fce420de43f2b00a8d5d3fe/1607352856167/jifanavegagaditipor.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/nubepotusopafu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc695edc6229360ecd44eb8/t/5fd6a82d267c8d0ace51fab8/1607903278527/website_image_er_software.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/avg_free_64_bit_windows_10.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB8 5300 bytes
SHA-256: 14d819189601a0706295eda619977ee7b611cda3c1386479e2f5342e3bbd844c
font_01_sfnt_off0000e0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F1 10528 bytes
SHA-256: 5ff51511895eacbb47ff51d2f38fec17b02be1b9286937d8aae03e420c07fcb9

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