Malicious PDF — malware analysis report

Static analysis result for SHA-256 f212e540ffbd2dab…

MALICIOUS

PDF

78.3 KB Created: 2021-03-15 13:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95ab698ca92ced89fa53442f8cb55dbc SHA-1: 26bc20a0e8893fb0969d187ea55ccd096a61911b SHA-256: f212e540ffbd2dab4f7e5b6aab85c3bf8b8f9c739d5ac2ca70c90fa3b2f40441
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated content and multiple embedded URLs, one of which is directly associated with a phishing lure. ClamAV and ML classifiers strongly indicate maliciousness, specifically a phishing trojan. The PDF_URI heuristic points to a URL that appears to be a search result, likely intended to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/award?keyword=c+programming+mcq+questions+with+answers+pdf
    • http://idealica-ordina.site/cd_key_de_cs_1.6_no_steamz2cwf.pdf
    • https://cdn-cms.f-static.net/uploads/4402261/normal_603b1f96660e8.pdf
    • http://nesorus.mywebcommunity.org/what_are_the_different_types_of_contrast_in_art.pdf
    • http://twirlini.com/7430817696836dk1.pdf
    • http://minosijasif.mypressonline.com/lavizewuzoruvow.pdf
    • http://xufamorazogubov.sportsontheweb.net/nunuxegetagibive.pdf
    • https://static.s123-cdn-static.com/uploads/4374976/normal_5ffec3582dc8c.pdf
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/1918ad5a5924e.pdf
    • https://static.s123-cdn-static.com/uploads/4501659/normal_5feb239c386c7.pdf
    • https://bepewosub.weebly.com/uploads/1/3/4/4/134445398/d7a404f088966d.pdf
    • http://hermidkovo.info/amasr_act_2010ye5e2.pdf
    • http://sallles.ru/xenugurasiboduwidujagn93e.pdf
    • https://cdn-cms.f-static.net/uploads/4376610/normal_602ea89cd21ce.pdf
    • http://rimka.xyz/26881915348dklf5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/3a2ba843-a938-4549-96eb-cff7cecb56a0/69325177229.pdf
    • https://uploads.strikinglycdn.com/files/7c56d5e8-7597-404e-a4c9-61109f1f707f/fozasuwononukivutorudep.pdf
    • http://liraperuwuw.atwebpages.com/28795800893.pdf
    • https://s3.amazonaws.com/difigomisosak/lolabafabebuju.pdf
    • https://s3.amazonaws.com/jipowumat/venixevegujawozudipu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e31c.bin
23c5135a1002dc797684f9be86c3fa1b6107eff1a90d2c4fb0a03ac3d2522f40
pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 5660 bytes
font_01_sfnt_off0000f63c.bin
89f047eecd6241eff4c59025030652c9605daa5f946d29686bbbbbdb82b3467b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF63C 11396 bytes
font_02_sfnt_off00011d0c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0C 4324 bytes