Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e361a98994d690…

MALICIOUS

PDF

81.7 KB Created: 2021-04-01 18:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9da40cf1a30f7e7c6ba08af55c4c2e9b SHA-1: e484c0de5763e38e9d8bfff772f7b142ae9782b7 SHA-256: 77e361a98994d690bd45d63ffde75f97027c254f5379317d19983e9e3a27cb82
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, and numerous other URLs are present within the document, many of which are associated with potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to app downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/wix?keyword=icon+pack+apk+nova+launcher
    • http://cashtanks.fun/6342345735w0q7v.pdf
    • https://cdn-cms.f-static.net/uploads/4458633/normal_6045f14974d1b.pdf
    • https://cdn.sqhk.co/lepudijazur/bnhsaUq/java._lang._outofmemoryerror_permgen_space_tomcat_7.pdf
    • http://blankid.ru/ramimirijunajuwapovelevv77y.pdf
    • http://about-igsupport.com/josidedufesosapowunidewamtguzn.pdf
    • https://cdn-cms.f-static.net/uploads/4369160/normal_600fafea04b3a.pdf
    • https://cdn-cms.f-static.net/uploads/4404528/normal_6030ec9496607.pdf
    • https://cdn-cms.f-static.net/uploads/4365660/normal_603b2db93b8d7.pdf
    • http://o-karte-kopilka.com/5363059248khdv7.pdf
    • https://cdn-cms.f-static.net/uploads/4406771/normal_60134257b7f9c.pdf
    • https://cdn.sqhk.co/wavefekus/khItFyN/pufagivugotujumijaninar.pdf
    • https://cdn.sqhk.co/xisalaximel/hilJheT/selovikexegakoxo.pdf
    • https://cdn-cms.f-static.net/uploads/4454824/normal_60649cf28c341.pdf
    • https://static.s123-cdn-static.com/uploads/4446390/normal_5fff6dc995e24.pdf
    • http://gafavow.22web.org/66093717322.pdf
    • https://cdn-cms.f-static.net/uploads/4370080/normal_60325d8cb70bb.pdf
    • https://cdn.sqhk.co/xeduwukaxusa/hdgdLHI/nintendo_3ds_gold_emulator.pdf
    • https://cdn.sqhk.co/fovudadeweto/hh8iezP/jigiletaxujetopisidogotu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mugofunuwutav.epizy.com/97325986839.pdf
    • https://s3.amazonaws.com/jonora/38354762358.pdf
    • https://s3.amazonaws.com/jefazaxal/moto_g_3_battery_price.pdf
    • https://s3.amazonaws.com/baxunaf/baby_happy_birthday_songs_free.pdf
    • http://pigadanafoton.rf.gd/99979862987.pdf
    • https://s3.amazonaws.com/sitok/wojuretozewilawazozukimob.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_off0000ff3b.bin
00d99c92eff482a004516a3a175bce3e5a1f2bc40744f9065f813d3c8564002a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3B 4904 bytes
font_01_sfnt_off00010fed.bin
b1df756065bab3faa9042f879eea2825120f3c3e8ce4170170ca62aaf44c59b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 11992 bytes