Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1af291db0a7e54…

MALICIOUS

PDF

84.0 KB Created: 2021-05-28 18:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1945fd233deff863ac49ecabad722624 SHA-1: 776be01cfc8e2edbdb2b972c58bc81cce218ab24 SHA-256: ed1af291db0a7e542bb564ca7a5bd2dc4eb4530a77d6d49507b7bcee41437332
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'baarspo.ru', suggesting a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or redirecting to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into clicking on deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://baarspo.ru/strik?utm_term=50+tons+de+cinza+filme+completo+dublado+assistir+online+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378167/normal_605093a32205f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424026/normal_5fd2294b3df13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_606b4343a80b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_606056d12e9bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_6068896337f5e.pdfIn PDF document text
    • https://gurogujanesoxub.weebly.com/uploads/1/3/4/5/134506981/87144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_5fd647302fad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_6056f3b433219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453337/normal_601645af86299.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457604/normal_5fedbed1c65fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415046/normal_5ffb8916e496a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_60660a49a04ba.pdfIn PDF document text
    • https://xelexezeni.weebly.com/uploads/1/3/0/7/130740222/sefafulagi_kafanuwobij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419225/normal_603367e48744f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412181/normal_60117e05e86bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_6024b52848640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_606ce9aaee0f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_60033391c65ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460241/normal_603eb628b66c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393502/normal_5fdf8619740ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420766/normal_600a517e19394.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/fcdee494-2804-46f7-a58e-b341057ed20a/text_structure_videos_for_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71dd3ac9-3129-4442-b278-5dc340d1af13/xapizilevabekiropako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbcd780-8ae7-48cb-b590-d0bd49891a7f/runonotapiwukoruvuzipu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 5676 bytes
SHA-256: efc754f53865954382c231d5e40d4b39f364639bbf77d93b34d8628f2e33c63f
font_01_sfnt_off0000f5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C0 12136 bytes
SHA-256: 9cd290fa28aff9f58e61930c069cc94fcc528db37c48f262bf240a4a685363b3
font_02_sfnt_off00011c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C27 16168 bytes
SHA-256: dcc437beaabc532c244cb2402c7e187dabb6fccd34af89cd9e2270a2a4498d3d
font_03_sfnt_off0001312e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c