Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8884de211150243…

MALICIOUS

PDF

165.2 KB Created: 2020-12-16 06:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 836170e14c16174fa98618587a14d7d7 SHA-1: 2651b47a953836f3bb3213f7873ae7180dcea64e SHA-256: c8884de211150243ab8575606ace3a1a4ecb5449ebdc6052884c26edd79d69a0
194 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector and uses an advance-fee scam lure, suggesting a phishing attempt. The embedded URL points to a known malicious redirector. Although no scripts were explicitly extracted, the PDF structure and the presence of a malicious link strongly suggest an attempt to trick the user into visiting a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://cctraff.ru/123?utm_term=p3+the+answer
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5fc66ea4784da.pdf
    • https://cdn-cms.f-static.net/uploads/4408718/normal_5f962a55c805b.pdf
    • https://cdn-cms.f-static.net/uploads/4369511/normal_5fb0272c33896.pdf
    • https://ravusosu.weebly.com/uploads/1/3/4/5/134589623/fujotum_tuxarodomozadez.pdf
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/tixerenexuzatadajib.pdf
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f880bc2caf40.pdf
    • https://cdn-cms.f-static.net/uploads/4417403/normal_5fb775e22696e.pdf
    • https://static.s123-cdn-static.com/uploads/4465010/normal_5fc77596f3529.pdf
    • https://static.s123-cdn-static.com/uploads/4385859/normal_5fccc7abec1ad.pdf
    • https://cdn-cms.f-static.net/uploads/4478716/normal_5fa977e8e8791.pdf
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/wukutixofud.pdf
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/varogifewan.pdf
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5f94ab8ed3309.pdf
    • https://cdn-cms.f-static.net/uploads/4383464/normal_5fba0423d67fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gelawiweza/scoresheet_basketball_fiba_2014.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
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dce1.bin
4f792376976d5da854e80bb8aa11948579d68fb051295bfe98725c18f1502c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCE1 31168 bytes
font_01_sfnt_off00023d8b.bin
51452eacd8894e292bf7111f1125bfca402242b8c500204d8ac6540bfc30896d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23D8B 5000 bytes
font_02_sfnt_off00024e95.bin
43afef6732eb9d0824c86831afc388cd19e74ddff18ce3420688fe665d05187e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24E95 12176 bytes
font_03_sfnt_off000277bc.bin
fabec606e516cf69f6dec6919936ba93b659fa13295e205095b57fc70665da06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x277BC 6084 bytes

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