Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3789d4dba07a569…

MALICIOUS

PDF

85.4 KB Created: 2020-12-25 01:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c38ad1d0bf7999ac466d4887b3c85892 SHA-1: 464828bf6fa4a1fc2c6fc960cb894d5e8a4ad1ac SHA-256: a3789d4dba07a5697bf1fb130e9a248113dbfe12db38134a490aedbd1f7861f8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffset.ru', which is likely part of a phishing or malware distribution scheme. The document body, though partially obfuscated, suggests a lure related to 'all star cheerleading uniforms design'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=all+star+cheerleading+uniforms+design PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f8b3c5dd145e.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/vobuturinivi/sodudubuwalimisevuzajud.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/cooking_mama_let_s_cook_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/centroide_y_centro_de_gravedad.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/punowubasa.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/16117256472.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/72119810946.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/snapchat_dog_filter_download_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/34991507820.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/juxerutesixas.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/34740513886.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/fifudewap.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/barista_express_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/rokenatogopamejubo.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CF 3224 bytes
SHA-256: c69638755af8d6b9300ab5ec7e076c556261dd42f96a29a03a3591598eef3ceb
font_01_sfnt_off0000db8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8E 5424 bytes
SHA-256: 170dc9a03fd116292d59dabebbc3ff812c7cb768a63aca3affbbd2da4e6453fa
font_02_sfnt_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 6340 bytes
SHA-256: 28a3b00f99b973cd5b25933552320199dcdf55e7eeb17f0bfabfa37e4cc478da
font_03_sfnt_off0000fd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD22 3160 bytes
SHA-256: cc4c9477c1b787c3449fdbec810205f5f980feae9d9a01d9a55489318e27a1d2
font_04_sfnt_off00010a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A13 11380 bytes
SHA-256: cbc30b4f728f2d55ca5fa674f86546a87f15ad44e74a429270aa4b229d1622a7
font_05_sfnt_off00013146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13146 16220 bytes
SHA-256: 8276e02a857948fc218cc4443ed1451d823f675d7d3a9c33308c253917d68fef

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