Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e13b57250f3b060…

MALICIOUS

PDF

72.4 KB Created: 2021-02-14 14:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b8d97a50e6d311751ae9433594d54852 SHA-1: d0bae5bdb088262cee2399074432446e916c954b SHA-256: 5e13b57250f3b060a842527ff8c64ff7036d89f5ee670f1f1de9b49505f1600f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, strongly suggesting a phishing or scam operation. The ML classifier and ClamAV detection confirm its malicious nature. Although no scripts were explicitly extracted, the presence of external URIs and the overall structure indicate an attempt to redirect users to malicious content, likely for credential harvesting 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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/123?utm_term=restringing+a+ukulele PDF link annotation
    • http://pimadukemaxi.22web.org/lagu_busyrolana_versi_alfina_nindiyani.pdfIn PDF document text
    • http://belegowu.iblogger.org/tracking_hurricane_katrina_worksheet_answers.pdfIn PDF document text
    • http://jumpfs.space/zapajomolebedebeminow8j8vv.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/bitozus-gevijugo-saxem-majikuv.pdfIn PDF document text
    • https://sulomotosepotu.weebly.com/uploads/1/3/4/7/134744650/joxorazaxiti_wepowana_zejetulurifik_vibiloz.pdfIn PDF document text
    • http://livunopewopo.iblogger.org/face_mask_sheet_everyday.pdfIn PDF document text
    • http://suzepiju.iblogger.org/how_to_make_herbarium_sheet_at_home.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459034/normal_5fdf47a4e8b02.pdfIn PDF document text
    • https://rokipidofavum.weebly.com/uploads/1/3/4/0/134042790/maxoziva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_601f793d81dbf.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
    • http://xefujifivifizu.epizy.com/84508035485.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/fishbone_diagram_in_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/netflix_free_for_android_box.pdfIn PDF document text
    • http://wazubumuxige.rf.gd/bigebogexijarirabonevezak.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/54539511490.pdfIn PDF document text
    • http://logedulon.epizy.com/58458776517.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_off0000d5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A7 4696 bytes
SHA-256: 81ac5e83f590cf8056e8a6370f54239041adf665820aa5ab8ed649e4f2c664cc
font_01_sfnt_off0000e5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A8 9744 bytes
SHA-256: f1fe76b306bbb12afde20a8b8fcba2c00c224d1fd49f5cd1c5eeef932e381a98
font_02_sfnt_off000106ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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