Malicious PDF — malware analysis report

Static analysis result for SHA-256 884fbffd1fdfff56…

MALICIOUS

PDF

67.2 KB Created: 2021-02-22 05:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f771383327728af55c01416a54dbe432 SHA-1: de374d76cad26359610031fd71b97eb0dbefdf27 SHA-256: 884fbffd1fdfff563dc38a373b9f4123c7ad63b5a276508efc744826cdb84d06
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector services, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs, such as 'https://yafferge.ru/wb?keyword=baby%20george%20rotisserie%20instructions', are likely used to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://yafferge.ru/wb?keyword=baby%20george%20rotisserie%20instructions In PDF document text
    • https://cdn.sqhk.co/dumadomizore/eifJmgf/vector_full_game_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/gfhcShf/angry_stickman_zombie_5.pdfIn PDF document text
    • https://jodeliloku.weebly.com/uploads/1/3/5/9/135975589/xatomumotodaroxepas.pdfIn PDF document text
    • https://cdn.sqhk.co/gotubosif/idgfcTZ/cartoon_wars_3_discord.pdfIn PDF document text
    • http://eliyalte.com/sibaduvubusoxenemakosotxbogp.pdfIn PDF document text
    • http://prolac.ru/free_bitcoin_generator_free_btc_20199r1l7.pdfIn PDF document text
    • https://pejifote.weebly.com/uploads/1/3/5/3/135348690/45b7b20ef.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/dadib.pdfIn PDF document text
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/viduvogo.pdfIn PDF document text
    • http://prod-fruit.space/black_and_decker_toaster_oven_specificationss80sb.pdfIn PDF document text
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/juwakeba-kewivasi.pdfIn PDF document text
    • https://lonojoxojiliw.weebly.com/uploads/1/3/1/4/131438577/2ede30aa.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/xisefowu/fetosubugamo.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/sharp_aquos_hdmi_tv_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/most_efficient_barrows_gloves_guide.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_off0000c9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F5 5224 bytes
SHA-256: d1fa7be0fc4250d141f86653ce92b1e3a0979abbb3298746473e9b20073787ba
font_01_sfnt_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 10036 bytes
SHA-256: a458b9136747f9ef2c8935892a3f122fcc7a3e5ffd3913ab256a982a75212d3c

Open this report in the interactive analyzer, or submit your own file for analysis.