Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70f9f27a2c41c5d…

MALICIOUS

PDF

79.7 KB Created: 2020-12-04 13:59:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ea007e81aa656a9cac13cce2872ff872 SHA-1: 1d107f7a892c84d8747a587beaddb7bbb8f98f67 SHA-256: e70f9f27a2c41c5deb4b4dc250f20f2d777c4909b04705446377a01df7a27c00
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple critical heuristics as malicious, including a redirector link to known malicious infrastructure and a PDF link farm. ClamAV also detected it as a phishing trojan. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or malware distribution.

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
  • 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.
  • 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.
  • 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=butterfly+bts+flute+sheet+music In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420031/normal_5fc3399d1e977.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/denebesaxademux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f89358b7c35b.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/6040266.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/vufupu/23493380509.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/18963198680.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5a21e18c5c478ef3437c/1606375970722/sony_portable_dvd_player_dvp-fx750.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/sensory_details_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/amma_cheppindi_telugu_movie_songs_320kbps.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf60ef3c6ccf69f3562259/1606377712103/divejimemimosekit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10b5488-61db-47da-94b9-9b09a4df6144/dream_league_soccer_2020_pc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 5200 bytes
SHA-256: ffb52c6a1dc028c9f44612c7d6c1ce07384b17ac3570f34348e683fd966e8b21
font_01_sfnt_off0000f719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 11040 bytes
SHA-256: 53e5f604574ca872e5f02fd75582528f6d8c88dc79295e99fb3f4d31ba75d95e
font_02_sfnt_off00011cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB6 16100 bytes
SHA-256: dbe3dd64dc066f428802739f18684eaf08c446fcda8cbe88d420f1ef9ee6b29b

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