Malicious PDF — malware analysis report

Static analysis result for SHA-256 de53367dcda2b2b7…

MALICIOUS

PDF

99.9 KB Created: 2021-03-04 22:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31cfbfe19ecb815178716dba0d64e2e5 SHA-1: 93fa6f636f3b85d2b416a9a3e7b03e5fc47763c9 SHA-256: de53367dcda2b2b703d2c792cc82604e0ac13910511c3ee5fb4bcd4caf09047d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely to trick users into visiting a malicious site. ClamAV and ML classifiers strongly indicate malicious content, specifically a phishing trojan. No scripts were extracted, but the presence of an external URI and the overall classification suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nipisod.ru/123?utm_term=skyrim+recommended+load+order
    • https://cdn-cms.f-static.net/uploads/4457332/normal_602b721804969.pdf
    • https://static.s123-cdn-static.com/uploads/4410695/normal_5fc828c0308a5.pdf
    • http://takovod.66ghz.com/measuring_units_worksheet_answer_key_chemistry.pdf
    • http://rijupoxog.22web.org/87054785289.pdf
    • https://cdn-cms.f-static.net/uploads/4370785/normal_601f7ff34aa3f.pdf
    • http://tegogufe.22web.org/bhaskar_oru_rascal_movie_free_hd.pdf
    • http://xajoboki.iblogger.org/information_classification_labelling_and_handling_guidelines.pdf
    • http://suwudera.22web.org/i_got_sunshine_in_my_pocket_lyrics.pdf
    • https://static.s123-cdn-static.com/uploads/4402486/normal_5fc7e63084203.pdf
    • https://static.s123-cdn-static.com/uploads/4421940/normal_5fcff67db3d96.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_e15d427dd3984938a8ed7fbdeaa4f766.pdf?index=true
    • http://lazefip.epizy.com/latest_drastic_ds_emulator_for_android.pdf
    • http://pevurevakube.rf.gd/soccerway_mobile_apk.pdf
    • http://misuxuji.rf.gd/ipmn_guidelines_acr.pdf
    • http://fizifar.epizy.com/fufosatiwokovudefijixipiv.pdf
    • http://numebazo.rf.gd/xufosezelidufevovi.pdf
    • http://biwodonugawodil.rf.gd/music_audio_masozi.pdf
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_87067b6933e24d8abb37140a25a0216d.pdf?index=true
    • http://kidogip.epizy.com/birojugotibifu.pdf
    • https://02b3b762-87af-4656-b60d-b25c74a7a964.filesusr.com/ugd/cacfd7_83cdddb1743d4e369f93f70fca789dbe.pdf?index=true
    • http://voxarenilime.epizy.com/how_to_prime_zero_pod.pdf
    • http://sijeviveb.epizy.com/37140082531.pdf
    • http://rejoritobelimid.epizy.com/bitcoin_algorithmic_trading_platform.pdf
    • http://rusoguwobanuga.rf.gd/brad_paisley_then_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014722.bin
48ff61211a52e1451c2c3fa87544fe844a270ab69724da09d03ece2139cd2f3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14722 5176 bytes
font_01_sfnt_off000158b6.bin
95737b9f1b8ed8181784e425b24a9bfda0c0897a766004320a0ee0e8d59fad7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158B6 13144 bytes

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