Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b2f62dce5feacc…

MALICIOUS

PDF

78.3 KB Created: 2021-02-14 06:53:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 96d3e2186754748228da937c9bc691e8 SHA-1: 83ca7926c1f578053606b95edf64c3d23df69a8a SHA-256: e0b2f62dce5feaccaad42bf85ab59a963b9f538b1bdc37006202eb06d8a23a8a
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ClamAV detection and ML classifier also strongly indicate maliciousness. The document body appears to be malformed or obfuscated, but the presence of numerous external links suggests an attempt to redirect the user to potentially harmful content, possibly for phishing or malware distribution.

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
  • 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://crophysi.ru/wix?keyword=destiny+2+threat+level+farm In PDF document text
    • https://static.s123-cdn-static.com/uploads/4446377/normal_60043fa0571a9.pdfIn PDF document text
    • https://cdn.sqhk.co/lajoroteb/hetQ4ji/hd_video_game_wallpaper_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/chcjeha/battery_operated_day_date_clock.pdfIn PDF document text
    • https://medisavepa.weebly.com/uploads/1/3/0/8/130815026/budiwukov-zugurevumaz-zifozid-dosugozezunaw.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/agfgjhb/72604394136.pdfIn PDF document text
    • https://tasitonedilegu.weebly.com/uploads/1/3/5/3/135301248/fabafugo_pixukujeg_ramaruralose.pdfIn PDF document text
    • https://lumuvimusu.weebly.com/uploads/1/3/4/7/134719948/4554300.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/2qhUfNx/tapixukamijogexogabibope.pdfIn PDF document text
    • http://sezidagajajam.iblogger.org/juritaxuni.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/jobavo/21649739973.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/pajavurebuvenazajaxev.pdfIn PDF document text
    • http://gogobat.epizy.com/44452065021.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/zinadexixukuzojakewuxam.pdfIn PDF document text
    • http://tinijev.epizy.com/jegikojabotoranajewulage.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/gemuraduwagadiporuzoxari.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_off0000f016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 5300 bytes
SHA-256: f27bb206baa3553a3b9ae393e677a71c0886dee49b56e474638b3b95ca305d52
font_01_sfnt_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 13360 bytes
SHA-256: ab7c3c05030f54c57f0ded49d06ba5b8198ba0bff12466a56f45b9db50644e8a

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