Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87f92dd815aa2c7…

MALICIOUS

PDF

78.3 KB Created: 2021-01-19 17:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2e6ed65c90c806e202f2d7abaacb8d0e SHA-1: 92f8e6e0f34df95329a0ca0367eae70721391edc SHA-256: a87f92dd815aa2c7249e47a780e8906f83fc3c98a0ce888c2f5e767ce073df1c
192 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate the document is designed to redirect users to potentially harmful content, likely for phishing or malware distribution. The presence of a 'download button' lure further supports this malicious intent.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?utm_term=bsc+nursing+application+form+in+rajasthan In PDF document text
    • https://site-1177706.mozfiles.com/files/1177706/animated_love_stories_movies.pdfIn PDF document text
    • https://site-1171989.mozfiles.com/files/1171989/57572284588.pdfIn PDF document text
    • https://site-1195597.mozfiles.com/files/1195597/detojeduxasadejid.pdfIn PDF document text
    • https://site-1175273.mozfiles.com/files/1175273/mod_world_war_2_medals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_5fe9c5d0103ca.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/rgdghij/xisujeromaxodal.pdfIn PDF document text
    • https://site-1168215.mozfiles.com/files/1168215/sodawusipuluremodirajeri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5fe6ce13bd6bb.pdfIn PDF document text
    • http://timatesanuvufav.iblogger.org/armed_heist_mod_apk_1._1._17.pdfIn PDF document text
    • https://site-1179526.mozfiles.com/files/1179526/rixotagabixuximub.pdfIn PDF document text
    • https://site-1251274.mozfiles.com/files/1251274/most_common_side_effect_of_metformin.pdfIn PDF document text
    • https://site-1180530.mozfiles.com/files/1180530/ts_challan_entry_form.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/zonivezada/wadaruw.pdfIn PDF document text
    • http://jegozejixal.epizy.com/autocad_2014_free_30-_day_trial.pdfIn PDF document text
    • http://pelubameta.epizy.com/71334719050.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/blessing_in_disguise_means.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/hauteur_d_un_triangle_rectangle_formule.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/free_printable_calendar_templates_australia.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_off0000f26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26E 5552 bytes
SHA-256: 6bccd466df5ee180f288ca3d7f4a3a304c99bb39023d2cd756b38fad1566f037
font_01_sfnt_off00010533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10533 10740 bytes
SHA-256: 9995658f96e9792b4f9477431c56d5a4af5bc127a81fecc7c6144f4e2dee2a5d

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