Malicious PDF — malware analysis report

Static analysis result for SHA-256 0142d0fd05e3f39a…

MALICIOUS

PDF

77.0 KB Created: 2021-03-22 00:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 03125ad1aed2e7990df98f3d9039354c SHA-1: 82c5176fdedabd6b0c67c21c7d90b03d89845889 SHA-256: 0142d0fd05e3f39a84a783518ef8a20a4de6f2d90e33c2f056458d4e6247202b
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, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The document's content, though heavily obfuscated, appears to be a lure related to technical issues, directing users to external URLs for further action.

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://midufefew.ru/aws?utm_term=polaris+280+not+working+properly PDF link annotation
    • https://rupafiwizumuwon.weebly.com/uploads/1/3/4/4/134442684/nogobesizovi_sirivoxewur_telekisofi_sawibitulebil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390052/normal_5fcd34b8acddf.pdfIn PDF document text
    • https://nivikaxixigimom.weebly.com/uploads/1/3/5/3/135322477/4aa48eb5d88ee9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388420/normal_5ff10ad19f2f9.pdfIn PDF document text
    • https://xemizumelisiga.weebly.com/uploads/1/3/1/8/131856695/98a2ad052284a09.pdfIn PDF document text
    • https://ronewomiz.weebly.com/uploads/1/3/0/8/130874064/duvazabadoduraro.pdfIn PDF document text
    • https://zepofujokedab.weebly.com/uploads/1/3/5/3/135315754/373750ef60aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447669/normal_6011ef7ea24c1.pdfIn PDF document text
    • https://nuguzawopaji.weebly.com/uploads/1/3/4/0/134040365/2fea168058b14d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_6053590fb6ae1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483335/normal_5ffbb826b35a9.pdfIn PDF document text
    • https://miduginoxem.weebly.com/uploads/1/3/4/8/134892771/9478136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_600b2c86f3dbd.pdfIn PDF document text
    • https://xokebewogaxuwu.weebly.com/uploads/1/3/4/5/134588239/7421744.pdfIn PDF document text
    • https://forugizatufuru.weebly.com/uploads/1/3/1/4/131410167/tinuwururox-lukufezedibopoj-nalefarurome.pdfIn PDF document text
    • https://lirejodeju.weebly.com/uploads/1/3/4/6/134628820/zefokezetox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482618/normal_5fdd40b902d90.pdfIn PDF document text
    • https://sisilodoja.weebly.com/uploads/1/3/1/4/131406442/d90d10078d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_6024a9ec1e40a.pdfIn PDF document text
    • https://busejupeguwija.weebly.com/uploads/1/3/0/7/130740624/dapexowagax.pdfIn PDF document text
    • https://dudegakabiwuzab.weebly.com/uploads/1/3/1/4/131406663/1837827.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/muwemivumazulax/pidapixa.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/ziwumokutivovates.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_off0000ebb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 5716 bytes
SHA-256: 52ac8ad130b85a439bb67fedab9469440f0b74b02f7d518d4a95c3af3b0c7fba
font_01_sfnt_off0000ff51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF51 11212 bytes
SHA-256: 9cf580b1c9544dfd46b9ce9254e123579a515af15736c4bd124c8f5da85be249