Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27be306ca1290f8…

MALICIOUS

PDF

73.7 KB Created: 2021-01-24 02:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0438eb0172ac1190828c86d22aa48304 SHA-1: ad38157beee1ee61a72ab6e0555c5b506a84a29f SHA-256: e27be306ca1290f8bf7c7e3e3a4a1bba517e72c3e8e8a760c2f0fb51e4516f87
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its inclusion of numerous links pointing to known malicious redirector infrastructure and a link farm. The primary link, 'https://traffmen.ru/aws?utm_term=academy+360+sunderland+ofsted+report', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to an 'Academy 360 sunderland ofsted report', suggesting a phishing or scam attempt. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/aws?utm_term=academy+360+sunderland+ofsted+report In PDF document text
    • https://site-1211231.mozfiles.com/files/1211231/letter_template_creator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384152/normal_5ff4290140163.pdfIn PDF document text
    • https://site-1176842.mozfiles.com/files/1176842/68193517126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481852/normal_600a00f24dd9a.pdfIn PDF document text
    • https://site-1253273.mozfiles.com/files/1253273/1500253008.pdfIn PDF document text
    • https://site-1179234.mozfiles.com/files/1179234/league_of_legends_mod_apk_android_1.pdfIn PDF document text
    • https://site-1178097.mozfiles.com/files/1178097/caissons_go_rolling_along.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373769/normal_5febf827bb6b3.pdfIn PDF document text
    • https://site-1178617.mozfiles.com/files/1178617/feriraravos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5fddaeade44df.pdfIn PDF document text
    • https://site-1247897.mozfiles.com/files/1247897/rosetta_stone_french_answer_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413347/normal_5fd03ced9e313.pdfIn PDF document text
    • https://vagewojevibo.weebly.com/uploads/1/3/4/8/134873572/6367797.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://s3.amazonaws.com/tarizirefevifab/incidentaloma_adrenal_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/hollywood_horror_movie_chucky.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_off0000d22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22E 5684 bytes
SHA-256: bcff60ce1e8e91759c33a088fd1860660d9aa5307faaf17349830821be2c1483
font_01_sfnt_off0000e56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56D 11216 bytes
SHA-256: b642c33a1c3ec7cc32258d01a586d0818a70ce3079e73d577d84846d5a74c537
font_02_sfnt_off00010bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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