Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b578ba73983a65…

MALICIOUS

PDF

75.5 KB Created: 2021-03-21 22:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1614fcb7f4d895e75e35b3c34c1a1f7 SHA-1: 5bbfee4527fbc7d0cf19df4037dfab11b0a6525a SHA-256: e5b578ba73983a6571a7c17860fdb1f07842cf0c3c79bcc68311ac0f0b29020c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/wix?keyword=word+stack+cheats+level+1009 PDF link annotation
    • https://tutitobogin.weebly.com/uploads/1/3/4/4/134485970/4218231.pdfIn PDF document text
    • http://hhizmet.com/mesufivefesajavomonulajedejkye.pdfIn PDF document text
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/kusefokifuvixigosob.pdfIn PDF document text
    • https://sakurulemiba.weebly.com/uploads/1/3/0/9/130969926/gutul-gadujaniwideg-tudemabigu.pdfIn PDF document text
    • https://guxisawupejova.weebly.com/uploads/1/3/0/8/130814058/1d9a8c86cd027.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/8c7e0b1.pdfIn PDF document text
    • https://dizewipukuride.weebly.com/uploads/1/3/4/6/134615497/jokirujeninimogame.pdfIn PDF document text
    • https://sozizupisez.weebly.com/uploads/1/3/1/8/131872239/takawifogenuvu.pdfIn PDF document text
    • https://pawimugonuri.weebly.com/uploads/1/3/4/8/134882006/basokor.pdfIn PDF document text
    • https://lifeniwa.weebly.com/uploads/1/3/4/7/134716756/dagiwojegaxuk.pdfIn PDF document text
    • https://vururera.weebly.com/uploads/1/3/4/4/134493513/gareno-vivitosetapu-bosuvaxaburi-rorokoleti.pdfIn PDF document text
    • http://selectgetc.top/vs_E5B590_E58B95E794BBnm0ty.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef458758-49e7-4661-8090-1621c6961dd5/lovizejem.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/1099355741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cbeaf1a-f4d6-4f0d-a76d-35ba1fc2c608/62924965376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/548c37a8-0ccd-4cc5-97ff-72e92b5471a4/english_gothic_architecture_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ec106c-9507-4c34-86a3-a02ef27bc432/pabijobavudupolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c23fb9-0ca1-4462-a1fa-f7e18883c4c3/popomowod.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/motorola_apx_8000xe_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/94415699559.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/rusovajazofitomutotu.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/gawufizekusobowululazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9254cda3-0c98-40b9-a147-f6086c6c0e41/maserati_granturismo_2020_cost.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A5 5516 bytes
SHA-256: 1399d35d7752e15dabccc209c98ad11ec54d22352171b39c01e1f896a3bd9b2e
font_01_sfnt_off0000fa74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA74 10720 bytes
SHA-256: 9022c6d902fac909ce6efa6e22daf16b9c676241638802e58b07dffb6bd8c40f