Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6fd6b6ce359ab4…

MALICIOUS

PDF

74.1 KB Created: 2021-02-23 09:39:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 89eb804cd53c2724a607dbdbc60231eb SHA-1: 6c9fd169c493d5bdf7bc3fa09fa12257043b8798 SHA-256: ef6fd6b6ce359ab46d0f2cb12a864e37de498267285001cd2b9ca96891aacc1c
124 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically mentioning invoice or payment language. It also contains an embedded URL that likely leads to a malicious site. While no scripts were directly extracted, the nature of the lure and the embedded URL suggest an attempt to redirect the user to a phishing page, likely initiated by a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/aws?utm_term=can+i+import+journal+entries+from+excel+to+quickbooks+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366385/normal_600e85d51ecce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380393/normal_5ffb2260555a3.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxogubajo/icJujdE/98471592129.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/Wqmgfig/76768958637.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/agd4haI/bawixol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383689/normal_5fcd7cb8ed48b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/pudetadenobuledafoma.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/29902012980.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/romeo_and_juliet_act_1_scene_3-4_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/bitlocker_software_for_windows_7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/11938732268.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/knock_balls_mod_apk_unlimited_money.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/21033440028.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/manual_blood_pressure_cuff_vs_automatic.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/delafatizuvuvivekozis.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/89566830943.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/jasonunivupeke.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_off0000e0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E6 5540 bytes
SHA-256: 5a02e40cde1545dbd8190f11e60d2509dd947d627bfd3e6bb0495e34d1f0cac3
font_01_sfnt_off0000f3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 11336 bytes
SHA-256: 8d3de914e7808558e1b0db3e6c84886c2093864bbd9d6cd3c7cc477ba05f277f

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