Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7e632ba7cdd3b9…

MALICIOUS

PDF

73.2 KB Created: 2021-02-15 04:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2ff4358c67d116286b97e9e332662c45 SHA-1: e9a3e9692f0a7452a17db94c76e5c9f442b565a5 SHA-256: da7e632ba7cdd3b9981dfcc9f99abd362e4461cd8eb29382b340463ee3bb6d66
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were extracted, the structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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/123?utm_term=akinari+persona+3+reddit PDF link annotation
    • https://cdn.sqhk.co/sipobufiw/gd3eonM/kaxevuxojedovizalirajifaz.pdfIn PDF document text
    • https://zedusolurifi.weebly.com/uploads/1/3/3/9/133999882/gosidime-gibupenufut-tolizopu-lenolafut.pdfIn PDF document text
    • https://pamimimafe.weebly.com/uploads/1/3/0/7/130775080/59a69e626bc.pdfIn PDF document text
    • https://nibasekugi.weebly.com/uploads/1/3/1/0/131070633/f624a4.pdfIn PDF document text
    • http://ighelpcenter.xyz/jetaudio_player_pro_mod_apk8elbd.pdfIn PDF document text
    • http://rimisirotox.iblogger.org/jederezumubuwinosi.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/2738633.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/iJ7ehif/queen_movie_ringtones_free_download_devotional.pdfIn PDF document text
    • http://sendgrid-de.com/85290910393hdbnu.pdfIn PDF document text
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/tisolitasuronez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426813/normal_60032d52af092.pdfIn PDF document text
    • https://cdn.sqhk.co/juvokapo/bhjvgcR/barcode_scanner_app_free_iphone.pdfIn PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/welafiwago-zopiwad-wimon-variv.pdfIn PDF document text
    • http://milimoje.iblogger.org/animal_crossing_hair_color_guide_new_leaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491451/normal_5fd148439cbaa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sefeluxezilire.epizy.com/toyota_corolla_brake_caliper_guide_pins.pdfIn PDF document text
    • http://kifobidurusidi.epizy.com/vemajunexo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B7 3324 bytes
SHA-256: 29bfa4b37bd2cef3e0e08c5da04f29e169ec41441d6eab6e772b631e9ee7e4f8
font_01_sfnt_off0000cdc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC1 5136 bytes
SHA-256: d91f02e219cd3876c5925e2ff0d4445c75f8e6b1c4ed031600b844a63588fb01
font_02_sfnt_off0000df46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF46 9984 bytes
SHA-256: c17e7867dc2a5214328683ca606a4636e0463363dfffe977bc9570b3565bbfb5
font_03_sfnt_off000101d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 16164 bytes
SHA-256: 0ddbdf075a6b93c30840c956f82c28930afd570615945c5f10d387cf6e2c8926

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