Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e105c507cff27c9…

MALICIOUS

PDF

68.0 KB Created: 2020-11-21 22:33:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0b227a0733939d85b94d2dae05868e7 SHA-1: ebbe6b00050b68622199be49c8f25493a7fd31fc SHA-256: 0e105c507cff27c904b6abd679f9482f0c8b4185aef1bd15dc66786c817bbb4b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=descargar+blade+master+hack+apk'. This URL is likely used to deliver a malicious payload, such as an application or further malware. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to downloading a hack apk, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/aws?utm_term=descargar+blade+master+hack+apk
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87029d81f10.pdf
    • https://cdn-cms.f-static.net/uploads/4404296/normal_5fa0a1833d47c.pdf
    • https://cdn-cms.f-static.net/uploads/4417037/normal_5f9c051701304.pdf
    • https://cdn-cms.f-static.net/uploads/4413121/normal_5f96c1f8a55f8.pdf
    • https://cdn-cms.f-static.net/uploads/4471971/normal_5fa42b8735cd3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/numegubowalonan/hoover_f7452900_manual.pdf
    • https://uploads.strikinglycdn.com/files/da90eb74-54d2-4650-ab76-d53f81a2de6c/dexulivuw.pdf
    • https://s3.amazonaws.com/fopalew/65296479317.pdf
    • https://uploads.strikinglycdn.com/files/8a6802c4-263e-4dd0-a748-a4ba29d2dbf0/wusidamorilegimujibonele.pdf
    • https://s3.amazonaws.com/kewuxejikiwe/59116059177.pdf
    • https://s3.amazonaws.com/suximawo/free_printable_bookmarks.pdf
    • https://s3.amazonaws.com/kewakuko/nazegipofesefedibenojil.pdf
    • https://uploads.strikinglycdn.com/files/8af43d6d-ab6f-4d05-b152-871977f986cd/7287155675.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_off0000c39c.bin
d6d44eb6cce40d77aa4d1b3f08edbca930610e483a218717194850e80148cf1f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC39C 5692 bytes
font_01_sfnt_off0000d6c9.bin
9c1b08f354ab33f35bc338db0da06ea599d7ef10d7d594132590d5165f6a44b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C9 13596 bytes