Malicious PDF — malware analysis report

Static analysis result for SHA-256 f385e9f28802ddd9…

MALICIOUS

PDF

79.2 KB Created: 2020-12-03 00:11:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6cb1ed04c2ff5d919b1377917193d18f SHA-1: 2aab00af6db3de1856b088163a4a30d73910a612 SHA-256: f385e9f28802ddd93758e9558e9bca1a0169f7c60ec7e6d75a40edaa48f7d094
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://gettraff.ru/aws?utm_term=anaconda+2+full+movie+english+free In PDF document text
    • https://vikaworapelesob.weebly.com/uploads/1/3/4/7/134702945/6d641c3cd504.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/4733702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da322a3-9479-4680-94a4-51671089ac4b/jexufazomobuxux.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15bd3ff13940aa242d827/t/5fc44bc1f8cdb769c66c71b1/1606699969487/33540438607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f9aa55a-ab67-4888-9fd3-ad5b1cfd7472/french_stories_with_english_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/zisejuwekojojakaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/autobiography_format_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/punotasewokaz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc530712e537a05ef24fe6b/t/5fc781569dfc2a4045220616/1606910313499/device_manager_command_line_shortcut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/690b20b9-2dca-4a14-9194-52769ec60763/kinupiwudolawegatekexud.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/95224021433.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfb473ca23154c95b6078/1606220620902/body_glove_water_filter_bg-1000.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/58381358463.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
    • 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_off0000d9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FF 5616 bytes
SHA-256: fbe87455e927cdb92e1574e9415e13f7ed6cd31773c77c28e6fd68c6625a9f84
font_01_sfnt_off0000ecfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 11452 bytes
SHA-256: bc456a9ef18e29229f3304f55f890eb912e0b2cb3d2a07300268af9102967c24
font_02_sfnt_off000113e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E6 17344 bytes
SHA-256: 26a3364d49b2a5d59295e324406c26cf8cc869313e20fae24d1f0fa984182fc8

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