Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb50c453f96bf0dc…

MALICIOUS

PDF

74.9 KB Created: 2020-12-27 04:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 31e0c9619d17fcd3c54374a4589341f2 SHA-1: 97fae1e78d8f34d989c33d42f167e49cf517ede3 SHA-256: eb50c453f96bf0dc736afa5a4307e13e938d5d6216452bb6e7189fa456c5cf39
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting an attempt to redirect users to malicious websites. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffnew.ru/aws?utm_term=jenkins+testng+xml+report+pattern PDF link annotation
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/jaxibisosepi_muvuza_zomibimam.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/67974.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/porepuri.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/gilebeb_xozigixes.pdfIn PDF document text
    • https://selimubujupaso.weebly.com/uploads/1/3/4/8/134847774/9863704.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/zizaned_wazozasuso_dinojekusiwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485161/normal_5fc5837847178.pdfIn PDF document text
    • https://komakuzafoge.weebly.com/uploads/1/3/4/5/134576335/5083002.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/kekunawi/types_of_sushi_roe.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/crash_bandicoot_unblocked_77.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/403e569d-ade9-4869-9e6b-7da1b2d00c6e/67845663193.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/sports_whistle_sound_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/37352779006.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/litawubazuwenolarebexix.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_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 5260 bytes
SHA-256: d294b90bf1bbc2d2acc8b4ee55a93773ce4b0beb7e2d9b8c2718ea7224ead26b
font_01_sfnt_off0000f6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D2 11756 bytes
SHA-256: d1eb84cd37dbf4ad6b097848458a3954f479ea23daf9b8a6a3e7dcf2c6c7605d

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