Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f1db215a88a959…

MALICIOUS

PDF

74.8 KB Created: 2021-03-23 17:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d48906cc72525f3067d5ff912467d0c7 SHA-1: 5233d531e913ff119915f671c6f426a6b8b78803 SHA-256: 56f1db215a88a95998b37a6e72aed5854f2a92d8765f82e0c8c4323fd52aebc8
156 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing or trojan variant. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent to trick users into providing sensitive recovery information. An external URI was also found embedded within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/strik?utm_term=windows+server+2012+r2+cipher+suites+registry
    • https://cdn.sqhk.co/tuxonewebuke/8ghSjbS/zezari.pdf
    • https://cdn.sqhk.co/jurugaguvedu/jjgdzgi/21583214600.pdf
    • https://cdn.sqhk.co/wamiratena/iEfieif/potion_punch_mod_apk_version_5._0_2.pdf
    • http://zumewidife.mygamesonline.org/nomuxajivanofoxubiravuje.pdf
    • http://wikowezenitezo.medianewsonline.com/tuxamip.pdf
    • http://fakutuzogazu.sportsontheweb.net/oral_candidiasis_adalah.pdf
    • https://cdn.sqhk.co/porekige/6hc1zji/indonesia_travel_guide_free.pdf
    • https://cdn.sqhk.co/zasokolof/2g2jcF1/best_video_browser_for_iphone.pdf
    • http://gebevojika.mygamesonline.org/black_and_decker_hedge_trimmer_electric.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wutejaxevewef.myartsonline.com/rinotovawidevaroxajerinut.pdf
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_cb23b3e9c3e040288e2fd6e0971f971d.pdf?index=true
    • http://dozopedatofol.atwebpages.com/55687980551.pdf
    • http://zatuvejamubolo.atwebpages.com/kenofatudezakomesuk.pdf
    • http://gepafelixadu.onlinewebshop.net/saudi_quran.pdf
    • https://4f640d82-8365-4c22-93d6-dbd3427c3fb0.filesusr.com/ugd/55e8b7_075840811ab94e3b8841a5b09fbc71ce.pdf?index=true
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_31b34d6785c4439ca8847a6fa312f923.pdf?index=true
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_37a1ac5aa1504bafb2b2e32989d3196f.pdf?index=true
    • https://s3.amazonaws.com/panalipolifod/54302550753.pdf
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_b58fbe12a73245f89d8ea2a2f83e0683.pdf?index=true
    • https://s3.amazonaws.com/tapelu/47395735421.pdf
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_0811cb27bdb54c18a857e03547908fd0.pdf?index=true
    • https://s3.amazonaws.com/sugosubexez/21424978182.pdf
    • https://s3.amazonaws.com/zedudo/serimez.pdf
    • https://s3.amazonaws.com/regegozumekoza/better_apartment_design_guidelines.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_off0000e4a1.bin
ea432c907c869a6b50b4aec341e831fc413e671f0bf57472f83f55efc9f69be5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A1 5684 bytes
font_01_sfnt_off0000f82d.bin
1f7e5e393ae76b814edd2cf3e282d0b957a12523c83a1b24699987516831e439		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 10924 bytes

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