Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f5ca4f16d5887b…

MALICIOUS

PDF

71.4 KB Created: 2021-01-04 00:56:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b2db65934ecaffc7091c5a131136750a SHA-1: 779bf84902e7a8e957793226f48d198858a04ca9 SHA-256: a7f5ca4f16d5887b27e6e66be3f036a7c102501a8826fbaabfeedd9ba6002184
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains an embedded URI pointing to 'https://traffnew.ru/aws?utm_term=bootstrap+gridview+template+asp.+net', which is likely a phishing or malware distribution URL. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the presence of the malicious URL and the detection signatures strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=bootstrap+gridview+template+asp.+net PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450419/normal_5fa7fb77124b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f922a86397ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466666/normal_5fe13564adb00.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/k14WijS/cash_for_apps_free_gift_cards_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5fa75b3357710.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_5fc9ec83a21a8.pdfIn PDF document text
    • https://cdn.sqhk.co/vosiwuli/gihegge/33621053797.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426423/normal_5fe5aa44cf25b.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/LejjEh8/bike_simulator_3d_super_bike_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_5fb3235e1cf07.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/kijelopazekune/the_barefoot_investor_for_families_free.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_off0000d37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37C 5512 bytes
SHA-256: e0591d4b34eabae587c7bdd6bfda568c501b4f8c0afde43c470375920ec7c0c2
font_01_sfnt_off0000e640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE640 12368 bytes
SHA-256: 6ce6cc8dea1c784a901987007c22d2bcf53551e1bab87be46bcb10130711564f