Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1dbd472e7c83896…

MALICIOUS

PDF

61.4 KB Created: 2020-12-23 00:35:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b6797ac2d5e3fa110894fdf9c4639585 SHA-1: 479c11b5a21261d96990dd251f7202a762917439 SHA-256: e1dbd472e7c83896e574ea5f127f5063c25b832efd8f5282f511520cb65f1c65
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru' which is presented as a download for 'master summoner pathfinder apk'. This indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?utm_term=master+summoner+pathfinder+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416510/normal_5f9c2fba4fb39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5f97a28398f4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5fd66cc63a30a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f899590c7c4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_5fabce45a658f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5f9138d2b0af5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476750/normal_5fd7dd881f2f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427103/normal_5fa15a62a84ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc65358085bf90c0e222242/t/5fd678a713a48350e815ba07/1607891111611/kuroko_s_basketball_game_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e5cef7cf8c75404468c7/t/5fc99f7685627875175597da/1607049079813/tanks_in_ww1_description.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6de2be2afa34b64ab27c8/t/5fcd0d23eb18547f4b8944f6/1607273763773/life_is_strange_2_episode_5_souvenirs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e925ea4a794d56451110/t/5fc10e4c4e98326c0235acfa/1606487628939/big_chief_old_wife.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/5_letter_word_start_with_be.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66105ec917750a3fcfc4e/t/5fcd84e705ddc9599d397b1d/1607304423744/minute_to_win_it_cup_stacking_game_rules.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd260a4c33eb106677a900/1606231570198/83903429258.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_off0000b14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB14C 5316 bytes
SHA-256: 746ad3d55f64cccfff1aa9b0e695a26594c479f8cbe878caf1183574c249347a
font_01_sfnt_off0000c344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC344 10524 bytes
SHA-256: c62ac99905f3948d47f894cc1fde5f2af66f7491e5e96ae3c4b786a2965dc65b

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