Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd9cdfa3627a0f5…

MALICIOUS

PDF

81.6 KB Created: 2021-03-23 12:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 430b51066e095f5342bbb99a5af821b5 SHA-1: 853d00c0a6427fc089a346b8a5d4185d1bf9af0b SHA-256: 6dd9cdfa3627a0f5349ffa047b4008ce75bb20ead013982400ba4b55db254b9b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=cloudy+with+achance+of+meatballs+2+soundtrack+all+my+life PDF link annotation
    • https://retizobokeli.weebly.com/uploads/1/3/1/0/131070240/8142605.pdfIn PDF document text
    • https://mopopapepiror.weebly.com/uploads/1/3/2/7/132741339/ed16a91.pdfIn PDF document text
    • https://regogugone.weebly.com/uploads/1/3/4/8/134891767/gofiwanim.pdfIn PDF document text
    • https://lufuwoxataj.weebly.com/uploads/1/3/1/3/131379696/db1210e.pdfIn PDF document text
    • https://fafafavavilaba.weebly.com/uploads/1/3/4/8/134893162/66a8f01a60e.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/zuseputugenil.pdfIn PDF document text
    • https://lelejijavifol.weebly.com/uploads/1/3/0/8/130874253/3510598.pdfIn PDF document text
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/57e7b6.pdfIn PDF document text
    • https://sivabukejiwija.weebly.com/uploads/1/3/4/4/134459056/2817114.pdfIn PDF document text
    • https://likimipezerejo.weebly.com/uploads/1/3/2/6/132682052/xamifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0a0e468d-0dcb-409d-8686-1d7b8c53ebf8/tabela_de_derivadas_e_integrais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2ec4877-ef0a-4f1c-b498-dec18189b59a/93656065493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c32c89fe-fcc2-4285-a163-532ef10eb477/newul.pdfIn PDF document text
    • http://nakuruxut.epizy.com/dd_3.5_monster_manual_2_download.pdfIn PDF document text
    • http://tuvivitir.rf.gd/signs_and_symptoms_of_peptic_ulcer_disease.pdfIn PDF document text
    • http://wokeben.epizy.com/awdhesh_premi_ke_bhojpuri_video_indicator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6260d2-69af-4fde-a8e5-f7122063b2c8/war_of_the_worlds_2020_watch_australia.pdfIn PDF document text
    • http://wefugugis.epizy.com/anthony_dasan_new_songs_masstamilan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae1c646-b57a-4451-84b0-61903cf9fa44/linear_algebra_a_modern_introduction_4th_edition_david_poole_download.pdfIn PDF document text
    • http://gotenekopibijo.epizy.com/cdc_skin_cancer_prevention_guidelines.pdfIn PDF document text
    • http://sezujilusevone.epizy.com/38916157528.pdfIn PDF document text
    • http://defakulid.atwebpages.com/48937659574.pdfIn PDF document text
    • http://xivegujox.epizy.com/asset_under_management_balance_sheet.pdfIn PDF document text
    • http://sezajebufixi.epizy.com/49663785144.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000edd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 5696 bytes
SHA-256: 2a4048b12d940e31c117ee43b320cb71a319c088126a7cea8d55f2b51fb31f46
font_02_sfnt_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 11312 bytes
SHA-256: ed0a4c428d99d75ba4484873c110cd64e1ebca0555e0ca33bab525e9e5382be7
font_03_sfnt_off000127ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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