Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeeba4fcb2fa84ab…

MALICIOUS

PDF

66.5 KB Created: 2020-11-11 06:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c37978d9f7d016c2346bea814272e93d SHA-1: 965a0a3d14922808e1eda9ee118da4d1b755f80e SHA-256: aeeba4fcb2fa84abed16c0a11380177f2f94f3aee590939a53829c9a5c3aa490
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO spamming technique. The presence of a 'download button' heuristic and a critical ClamAV detection for 'Pdf.Phishing.Trojan' indicates a malicious intent to trick users into downloading further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/123?keyword=iptv+app+on+apple+tv PDF link annotation
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/5713614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f8936168a3f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_5f97c5137d1b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_5f90f26d49c78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5fa2ee96eb6fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402717/normal_5f922631800c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f9b9353a60fa.pdfIn PDF document text
    • https://kikuvabafot.weebly.com/uploads/1/3/4/3/134332304/bumibadorigemugoxa.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/baritexovopa/65064315653.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/xizevixafoxijujepesudoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ddeeb7-62e2-4a2d-812b-463b37ec8a34/25625354377.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/xevivudalakigali.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_off0000ca59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA59 4536 bytes
SHA-256: a40224bf891604d5833875f813a0c15e0697488a9e9df5a74e4c21c088b2e4ff
font_01_sfnt_off0000d9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E2 10420 bytes
SHA-256: de14b04f7ef862a9248ff8271f423ad70c5eb559102a096d7cde6ca969f31716

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