Malicious PDF — malware analysis report

Static analysis result for SHA-256 552cd2d16a99a270…

MALICIOUS

PDF

81.6 KB Created: 2021-05-15 12:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a2dfc22339df32a0e1e319d2149b1ec3 SHA-1: d36d9f95d2ec1ac9b742eea14b910168ead5e17a SHA-256: 552cd2d16a99a270a2d4805aeb09cd5083452292777f7e9b92f42abc54e66195
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, with one prominent example being https://bexudedumazises.weebly.com/uploads/1/3/1/4/131406785/fce75c919a7da.pdf. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to 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
  • 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/strik?utm_term=don+juan+demarco+watch+online+123 PDF link annotation
    • https://bexudedumazises.weebly.com/uploads/1/3/1/4/131406785/fce75c919a7da.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/3KhfgeP/53199299631.pdfIn PDF document text
    • https://cdn.sqhk.co/wukorovev/h5Yib1z/lotigu.pdfIn PDF document text
    • https://buparemekixa.weebly.com/uploads/1/3/0/7/130739227/nilulifuxejoro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/naxobisidufebegatalarem.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/rijisakusu.pdfIn PDF document text
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_895b1f28182e42f89adc8e03511b5424.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b703d12-7800-411a-9f4f-05bdf5f4812e/wisuleminuwuwotimo.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_a58e92d4a49a4f9faebb39335634999a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a9f433-76b1-4398-a3d7-a27ffcf8a88d/mulaf.pdfIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_c72b39d8004b45fa91f7d3eb5689ca76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jezobasit/power_of_attorney_act_1982.pdfIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_6dac8bcd6aca41c0bdd785845728741e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e975ca38-072e-47fb-a54a-872c83607472/the_classic_slave_narratives_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/why_does_my_insignia_smart_tv_keep_turning_off.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/94892573352.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_6286ac04239d4f4c8eab7c168f46a78b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bfbc514-ba43-4bf5-982f-df2b66fe2420/sebon.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_off0000e46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46B 5516 bytes
SHA-256: 0adec352297f387b03e81a833b8797070476b78fb793933fc2731ffb9ec1a00e
font_01_sfnt_off0000f725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 11100 bytes
SHA-256: ba8f003f1531beebb5c0a4319e3ef2ca2d67b73a99476149d1c47777851e93e7
font_02_sfnt_off00011d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D48 17716 bytes
SHA-256: 2052e205974b8bc183d0e13ce751a3c029af05f2b53c5fa1ee1a7a38ff82c5f3

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