Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7e016695aee9e9…

MALICIOUS

PDF

69.8 KB Created: 2021-05-18 03:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74a8db320fabec3b596bebe6bab4789a SHA-1: b56451b8b6eccab0b200f35cfadace89ffd12bf2 SHA-256: 1f7e016695aee9e9c1a3a8b9db07eb656e79004c0f1388da678babe9b302533a
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a lure for 'free Robux', which is a common phishing tactic. The embedded URL points to a known malicious redirector. ML and ClamAV heuristics also flagged this PDF as malicious, indicating it's likely part of a phishing campaign or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/strik?utm_term=how+to+get+free+robux+2021+march
    • https://cdn-cms.f-static.net/uploads/4461229/normal_600bd67cdb3d3.pdf
    • https://static.s123-cdn-static.com/uploads/4457006/normal_5fed9415a339e.pdf
    • https://cdn-cms.f-static.net/uploads/4444869/normal_602174aa84e3d.pdf
    • https://dezuvamugofa.weebly.com/uploads/1/3/4/1/134131805/nisimimovaz.pdf
    • http://vuwobide.22web.org/sage_chart_of_accounts_template.pdf
    • https://cdn-cms.f-static.net/uploads/4494139/normal_60132d6a4f10a.pdf
    • https://xibimitavidin.weebly.com/uploads/1/3/1/8/131871740/zeputoninawe.pdf
    • http://jatuligirez.22web.org/grief_and_grieving_process.pdf
    • https://cdn-cms.f-static.net/uploads/4369158/normal_6028158e36768.pdf
    • https://cdn-cms.f-static.net/uploads/4465941/normal_5fd7860921d0d.pdf
    • https://static.s123-cdn-static.com/uploads/4379846/normal_5ff25ecc12eb1.pdf
    • https://cdn-cms.f-static.net/uploads/4365594/normal_602e99848811a.pdf
    • http://jukavoluv.iblogger.org/google_agenda_application_android.pdf
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/mipeg-jolufubukiteno-webetamivodoku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fejukuvazov.rf.gd/bruel_and_kjaer_2250_user_manual.pdf
    • https://s3.amazonaws.com/nigimul/naruto_blazing_mod_apk_2._9_0.pdf
    • https://s3.amazonaws.com/wutogugej/how_much_are_contour_next_test_strips.pdf
    • http://relizaki.epizy.com/reference_list_for_job_template.pdf
    • https://s3.amazonaws.com/tesasubawalozan/1965710706.pdf
    • https://s3.amazonaws.com/fapaga/compound_interest_worksheet_answer_key.pdf
    • http://zitovidenelanus.rf.gd/11748282274.pdf
    • http://bubezowi.epizy.com/selumiwelawikutibek.pdf
    • http://dudowowadoz.rf.gd/vanizasiregisiju.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_off0000d2c0.bin
63d344031079387f74959d19274fbb546587cf594ad9d08f6a842c7a2c8fafbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C0 5672 bytes
font_01_sfnt_off0000e60a.bin
79092bf3686830553f74a7283c7ab3ffbd481349f307ebe3672d765058642759		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE60A 10552 bytes

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