Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42320bedc0eb9e0…

MALICIOUS

PDF

71.0 KB Created: 2021-02-20 18:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5b72afa8c5f77e592a697a955110728b SHA-1: 84f74198a4cfc415efb65b00258b2ebb8a9b8f6e SHA-256: f42320bedc0eb9e04aabddce91448bdbd504c9d0ab348bdd68b67b20417ff7f7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to accessing a TV service menu, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=access+samsung+tv+service+menu+with+smart+remote PDF link annotation
    • http://s7hmus.org/pifaduxuruvisixotisdhw7.pdfIn PDF document text
    • http://fb-ig-violation.com/reply_to_thank_you_email_formal_sampletveq0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445343/normal_6001650080490.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426679/normal_6003be6d5224b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413843/normal_5fcf4ab419228.pdfIn PDF document text
    • http://alexsaf.ru/android_dialog_blur_backgroundkt0s1.pdfIn PDF document text
    • http://smotrikino.fun/insensibility_wilfred_owenog9pa.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/pobixedele/xiweduvikelakonozeziku.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/xebazetesitelenovi.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/32220375420.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/59247645490.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/63803539540.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/what_is_thermal_energy_in_simple_words.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/toxowaxi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA23 5320 bytes
SHA-256: f733e94f76c4f21a0fd7783a290db51fdcd6d213b54a87da29116322143036d6
font_01_sfnt_off0000ec25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 10080 bytes
SHA-256: 78a4110225c3c66eaebb858f169c636ddf30fe4bb98dd429a6c91ae8ea528c2c