Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4ecb862aa77dae…

MALICIOUS

PDF

80.9 KB Created: 2021-04-27 09:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ea030f2de62a6e5398fac32af2f7f930 SHA-1: 25861d28df1b25dfae91a83eb68015471ea2cc61 SHA-256: cd4ecb862aa77daed2ceec568a89c754655b60471c1c7386729231827d01a3d8
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text suggesting a lure for 'Addictive drums 2 demo', which is a common tactic for phishing or malware distribution. The presence of external URIs and the overall structure strongly indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/strik?utm_term=addictive+drums+2+demo PDF link annotation
    • https://cdn.sqhk.co/lusimalifa/hi5ojaF/persuasive_speech_format_outline.pdfIn PDF document text
    • http://uablog.website/42797067537pq3pr.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/ggg9ig3/nevowafojirabujazide.pdfIn PDF document text
    • http://salonop.xyz/8616813984360kft.pdfIn PDF document text
    • http://budonap.iblogger.org/behind_blue_eyes_guitar.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/xunidexoxaxuvusiruxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392195/normal_5fc7bf7287274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488558/normal_5feb862c9251f.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/notedazor.pdfIn PDF document text
    • https://daxusumupazi.weebly.com/uploads/1/3/4/7/134702932/e237f2aefaad5b.pdfIn PDF document text
    • https://kowenijog.weebly.com/uploads/1/3/4/0/134096242/vawogipeva.pdfIn PDF document text
    • http://famavusejozeroj.iblogger.org/fumaxapabovajef.pdfIn PDF document text
    • http://buzofenag.22web.org/rosukalulexamelugoguk.pdfIn PDF document text
    • https://sasozubavurak.weebly.com/uploads/1/3/4/8/134886198/8475655.pdfIn PDF document text
    • http://gitikirazidapi.medianewsonline.com/zokesidilol.pdfIn PDF document text
    • https://cdn.sqhk.co/bilexodofose/djghiig/dialogflow_cx_api.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402014/normal_6016bed0d6aa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474988/normal_5fd7a6e8ae92a.pdfIn PDF document text
    • http://requiredjokblog.com/el_corn_en_espaol_completo20brm.pdfIn PDF document text
    • https://cdn.sqhk.co/tepikipo/jckhgvK/16106036002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_6047cfa8b88dd.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://muwalolerede.epizy.com/lotebojofizoderemi.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/search_google_images.pdfIn PDF document text
    • http://gurifituzegotu.rf.gd/50764760838.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_off0000f327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF327 4800 bytes
SHA-256: 0f60a3d36dde14fc998babe8fe9e4eee8d6ae95ed6caf67e003f3bb0ecf37be3
font_01_sfnt_off0001037e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037E 11096 bytes
SHA-256: 3ba5cf10f8620bd27007f506a6be9be2ac8d31e3959a6079ff827cd364823a5b
font_02_sfnt_off0001282e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e