Malicious PDF — malware analysis report

Static analysis result for SHA-256 9413ac19ea296e3d…

MALICIOUS

PDF

66.1 KB Created: 2020-11-26 08:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: a8e30ed81d51cbe05447784e3453b363 SHA-1: 9299b044b355c43ec5e6f8f347ad0015921c5350 SHA-256: 9413ac19ea296e3d0ca98cc69eb5f5820c56f3246e46199190e9e6779507ac4b
144 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a phishing lure for a download. The document body, though heavily obfuscated, contains text related to 'Nba 2k18 mod apk android 1', suggesting a fake download lure. The embedded URL points to a redirector, likely serving as a distribution point for malware.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/123?utm_term=nba+2k18+mod+apk+android+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415527/normal_5fbbb04e71eb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5f9fb4fa161c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402520/normal_5f9e7581c0e48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484375/normal_5fb2b50202d19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_5f9699cfb6c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451049/normal_5fb4451e66589.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/livivuvuwugeb/28206328456.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/cookbook_template_docx.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/77668309323.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/wexikabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/194da69d-d6aa-4c98-a756-447221713a87/3087045415.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/android_one_xiaomi_a3.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_off0000c4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B8 5448 bytes
SHA-256: 1fcbdb6f3e9187159c270ff8cceac8406c33eaabd14f3092ae3f73c927dcc026
font_01_sfnt_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 10592 bytes
SHA-256: f5116cf51adee6dbf4cda9d67747499342d457d2c6bc1ca7cf461b4d83fdcb35

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