Malicious PDF — malware analysis report

Static analysis result for SHA-256 169b42835661b18a…

MALICIOUS

PDF

86.5 KB Created: 2021-03-25 09:24:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f5770dbf30b124d5bc3b61c7ebda2a94 SHA-1: 230816608a58783ee5b66928e2191b74d703322b SHA-256: 169b42835661b18ae04f970959845952a59141cf6c4a7997de344cff30459c1c
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, many of which point to disposable domains and redirectors, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to search queries, further supporting a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=why+does+my+jigsaw+blade+keeps+falling+out In PDF document text
    • http://kismyketio.com/tipos_de_acordonamiento_de_seguridadsnbxi.pdfIn PDF document text
    • http://investorlands.ru/radelorogugagufujuxawahjqqw.pdfIn PDF document text
    • http://onatural.space/72_names_of_god_youtube4860z.pdfIn PDF document text
    • http://hookup671.site/sidepigzqajw.pdfIn PDF document text
    • http://arendaavto.taxi/howard_miller_desk__shelf_clocksdpp6b.pdfIn PDF document text
    • http://leon-stavki.info/690561000513ucby.pdfIn PDF document text
    • http://gelivebun.22web.org/simple_addition_worksheets_for_kindergarten.pdfIn PDF document text
    • http://molotkov.site/ririvibajaramanetagrp72.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/DjhTijT/tank_battle_world_war_ii.pdfIn PDF document text
    • http://yoga-fitness.space/78726121816a2702.pdfIn PDF document text
    • http://cheapestshop.xyz/zojaluxinenatx9sh5.pdfIn PDF document text
    • http://svoydvalend.xyz/lirefilokabavekavesapetik3v6iw.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/xagaxatuwolaxolagosikofupmtwd7.pdfIn PDF document text
    • http://cmbclientes.com/material_science_by_sp_seth_free_downloadb9znd.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/zevudugewa8ywqn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaxidos.epizy.com/betta_fish_wallpaper_for_android.pdfIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_4f44c45bf2b8456f8993a3338ff898e0.pdf?index=trueIn PDF document text
    • http://kilisajafe.rf.gd/raronazelazifujamagime.pdfIn PDF document text
    • http://nevozabewovezo.epizy.com/66365748131.pdfIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_78b24df7c3ee4db79c5593761c87e52c.pdf?index=trueIn PDF document text
    • http://lepamiv.epizy.com/xuwelatudulagixifusavibu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 5848 bytes
SHA-256: 748291be77fb5bc3297bbf3aeb4e8bbc0f246e8736c74052e61e497e2509f578
font_01_sfnt_off00011049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11049 11280 bytes
SHA-256: d46be7bdcd6ef13854a5832e82679ec3d5e140c861c0ac2fdcfab950943f27c5
font_02_sfnt_off000136bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BB 16220 bytes
SHA-256: 1fe70797c8c7a77d2bf1be492e3192b12fabe7ad70c7db9f589b81949ebf5a5d