Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a9a064604a59db…

MALICIOUS

PDF

73.4 KB Created: 2020-12-15 20:38:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c3063452f7eb41cb3239155908bf3915 SHA-1: e72bf9a7088d1dd0a828e81bd4578af075b13827 SHA-256: a5a9a064604a59dbb7fd17ea5b3fea13c321558b1d2f1d137448516318204a27
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, appears to be a lure related to a worksheet. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of phishing or malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=lesson+10.1+pythagorean+theorem+and+its+converse+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5fb2d8f4d2446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5fa05ea558b05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410678/normal_5f9d230d82602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5fd0a06b6bac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459922/normal_5fa63ded10697.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://static1.squarespace.com/static/5fc4ed69e2fce462bca5ae1b/t/5fd1510ef1e89449b165e1b3/1607553295113/ladybug_score_counter_golf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc717bec39fde0238a7ff67/t/5fd7239e154d727871053c85/1607934879265/81801225411.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11101d26ff1194f749d44/t/5fc5b3669ee0f32b8718ec3d/1606792040544/65046820812.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/google_sites_new_sites.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbca2e537a05ef08df7c/t/5fc1d442173fb5383be5f964/1606538311186/18956797492.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/gededik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ca6faa0dc1643a2d2575/t/5fd61bf8481cfa31adbf1260/1607867390084/antivirus_panda_gratis_baixaki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc110e511f6a419848698ae/t/5fd1a63d7cf94534dc5853e0/1607575101978/pirates_of_the_caribbean_tow_game_mod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD251 5728 bytes
SHA-256: ff25457e30899c713d311094841364b1f74222700cdf27269216b63cabc5e673
font_01_sfnt_off0000e5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C4 10492 bytes
SHA-256: cb2a6399709070f2fe2767d913cb738cb55eca3615462e81978f963327234009
font_02_sfnt_off000109b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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