Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0dd7db5040a2964…

MALICIOUS

PDF

146.0 KB Created: 2021-02-15 21:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a451a688fbf77f6c9edb4c86ff38af5c SHA-1: 469d248b9a9a08719c96039b8ef501e28199819f SHA-256: f0dd7db5040a2964f33a83d8ff92bc146ec8ffe00e24f270ceced8e92da722a4
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing or malware-hosting sites. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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/wb?keyword=maya%20angelou%20brief%20biography PDF link annotation
    • http://freedate18.xyz/zombie_frontier_3_hack_apk_modpuths.pdfIn PDF document text
    • https://rolobidixogiru.weebly.com/uploads/1/3/1/6/131637372/209168.pdfIn PDF document text
    • https://dukuvurijo.weebly.com/uploads/1/3/4/5/134522813/1048016.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/dhehi1I/marketplace_insurance_texas_providers.pdfIn PDF document text
    • https://cdn.sqhk.co/zewuxumaro/Ngj46U4/supipixafax.pdfIn PDF document text
    • https://mozufakumijisa.weebly.com/uploads/1/3/5/3/135333945/pimasozar_ganupe_boxufuvoda.pdfIn PDF document text
    • https://tazumeter.weebly.com/uploads/1/3/1/4/131438167/2952787a6c74f7.pdfIn PDF document text
    • https://gavanigo.weebly.com/uploads/1/3/1/3/131380609/5d75cdff.pdfIn PDF document text
    • https://buzoraxuv.weebly.com/uploads/1/3/4/3/134366179/3174332.pdfIn PDF document text
    • https://vuxupiwiruxip.weebly.com/uploads/1/3/0/9/130969000/a8182.pdfIn PDF document text
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/sefosuwure.pdfIn PDF document text
    • https://wufaderafezika.weebly.com/uploads/1/3/0/7/130776219/tederovanawodi.pdfIn PDF document text
    • https://molukubiluvu.weebly.com/uploads/1/3/1/4/131453067/bonoturosakowi_kewikote.pdfIn PDF document text
    • https://muvanuxeb.weebly.com/uploads/1/3/4/0/134096654/manesunamude_finema.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/728c06a67629.pdfIn PDF document text
    • https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/vakexoxakulorew.pdfIn PDF document text
    • http://fredo.bike/nurani_quran_with_bangla_translationnpw78.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/B4hi0ha/merge_farm_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/Y4iiHQM/greyhound_racecards_racing_post.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/zulezov/halloween_cat_eyes_template.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/52542234113.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/34405311294.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C646 6500 bytes
SHA-256: 65585bc7470c647aceeabd2381d9b2c309e1b22f26f31c0725bf617309e33dcc
font_01_sfnt_off0001d67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D67D 5232 bytes
SHA-256: 6f5e8407dbe14340d9b9c52723df270794b90c2f3101430c2da2a1f84d6969c7
font_02_sfnt_off0001e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E85E 11904 bytes
SHA-256: 2ddafd054662cae8251643d3f49dd176c03b5024a3da2377eeb5432c4005af8c
font_03_sfnt_off00021118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21118 16460 bytes
SHA-256: 555eeaf4da24d40f4ce8d1e33b544fced32cc7de241368c8c108a35a938ac058
font_04_sfnt_off000226e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x226E4 6464 bytes
SHA-256: 35e2d3d372f9fdb3a3ad4a6482dc95dc33d9b92bedfbc1b8395ca4f9ca06fa2e