Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6de1d1f31c22561…

MALICIOUS

PDF

92.4 KB Created: 2021-06-14 08:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9b7cc96a368b44090623c912cfef25df SHA-1: c35924e1b62315066b60f569b93e1fa9166a53d2 SHA-256: c6de1d1f31c22561011d8a8c2b93965175710ea5fa4a481182d6b6ad19260e12
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 hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://huntic.ru/pbw?utm_term=how+to+get+jungle+grass+seeds PDF link annotation
    • https://genaxixa.weebly.com/uploads/1/3/1/4/131437685/6254049.pdfIn PDF document text
    • https://lipukafawo.weebly.com/uploads/1/3/4/3/134335084/fobol.pdfIn PDF document text
    • https://lotimameligibim.weebly.com/uploads/1/3/4/2/134235738/6913534.pdfIn PDF document text
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/1428036.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/gasipipuzazu-pivaxiloneb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457857/normal_604ad2918f29b.pdfIn PDF document text
    • https://wubeponasi.weebly.com/uploads/1/3/1/6/131606197/zokibufiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477183/normal_60444b0fcdead.pdfIn PDF document text
    • https://metekazup.weebly.com/uploads/1/3/2/8/132815755/mesok-getatedan-xifazozovefupef-gipozo.pdfIn PDF document text
    • https://xolipesu.weebly.com/uploads/1/3/4/6/134672505/cac692cb3bb9e66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_605d86f884081.pdfIn PDF document text
    • https://rowimibakerideb.weebly.com/uploads/1/3/4/4/134494798/736e8ced4d37f.pdfIn PDF document text
    • https://foniliwis.weebly.com/uploads/1/3/2/6/132695455/09e3e9.pdfIn PDF document text
    • https://gopoxigubujazu.weebly.com/uploads/1/3/0/9/130969754/08ca6cde55342d5.pdfIn PDF document text
    • https://nabesoke.weebly.com/uploads/1/3/4/0/134042749/d7951c5a491e45.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
    • http://zopilep.pbworks.com/f/66256001476.pdfIn PDF document text
    • http://luwolozibiva.pbworks.com/f/nesavegefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b36a609-8516-4340-a185-fd8d47346baa/lowiworeko.pdfIn PDF document text
    • http://daridameku.pbworks.com/w/file/fetch/144943518/mod_sims_mobile.pdfIn PDF document text
    • http://sejuworepow.pbworks.com/f/83449463089.pdfIn PDF document text
    • http://japakekuwita.pbworks.com/w/file/fetch/144918093/free_download_mp3_i_love_you_baby.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46233e7b-8a84-4cde-bd5b-7e3ee310f730/wirilemujatabojorajam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa7e534c-a405-4f8c-a561-adda7faa0679/simultaneous_equations_worksheet_maths_made_easy.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12193 4956 bytes
SHA-256: 997fe38a50715aca40df90818c98147d163023093cf1e9c74dc04663ce5f07b6
font_01_sfnt_off00013296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13296 10384 bytes
SHA-256: 2ce26691bc9c71d1e162e6bd2112ad77ccb45b9a5ea771db8ebd1712d70287ad
font_02_sfnt_off000155c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155C2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c