Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde8e5346deb1de8…

MALICIOUS

PDF

78.1 KB Created: 2020-12-28 05:33:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5f15d23c775e02c79e3857f4e48561bd SHA-1: 28838145740e7136e30a6ccc777418c37d9fdb31 SHA-256: dde8e5346deb1de8c55e1b8f60acba184a48f10fe1f2f5066190cdf8ecda14cb
104 Risk Score

Malware Insights

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

The file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of embedded URLs, including one pointing to 'trafffe.ru', suggests an attempt to redirect the user to a malicious site or download a payload. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=furniture+company+profile+template PDF link annotation
    • https://binolopokam.weebly.com/uploads/1/3/1/4/131484395/dedowu.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/lowutelezewizuku.pdfIn PDF document text
    • https://lusizemanu.weebly.com/uploads/1/3/4/1/134108609/1115202.pdfIn PDF document text
    • https://cdn.sqhk.co/bitubebo/ighbjiM/xenonojevamulaxenenomegi.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/ygibhjg/tamil_dialogue_sms_ringtone_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zakikola/jggjjgB/airbnb_host_login_nz.pdfIn PDF document text
    • https://puxusatorujebi.weebly.com/uploads/1/3/4/7/134749887/a8edf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/15f2ec01-5efb-4449-8828-520bdb26167a/mizuvifivipumada.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/nixevigoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb39548e-9ae4-40b5-961c-4836ec9ebd03/google_sites_not_working_on_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/bluetooth_driver_for_hp_notebook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EA 4920 bytes
SHA-256: db481b314003652de3117e8d866d95278616b4553c4898caf4d2781901404c8a
font_01_sfnt_off0000fa95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA95 10276 bytes
SHA-256: 621e84b13d092e0485b49501cf3721b023cf6facdc29585cfca5267d1d1029d0
font_02_sfnt_off00011d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D65 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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