Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfeb6119e648517f…

MALICIOUS

PDF

79.4 KB Created: 2021-06-08 03:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 56782f710167afa996d3f3cc177476b8 SHA-1: e6703a344c92af3d1434416f35f706521d2155ce SHA-256: bfeb6119e648517fdfa45bc5b2e60f8965b59cc16a29a5fe59b11472582e5581
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://allytemp.ru/pbw?utm_term=how+to+set+up+firestick+for+the+first+time PDF link annotation
    • https://xupunidumurewes.weebly.com/uploads/1/3/1/4/131437359/roderejofarusupe.pdfIn PDF document text
    • https://sajejedazo.weebly.com/uploads/1/3/3/9/133999783/bfa0b5849.pdfIn PDF document text
    • https://xatuguje.weebly.com/uploads/1/3/1/8/131856293/618206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_605d744b2cf99.pdfIn PDF document text
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/sudef.pdfIn PDF document text
    • https://xivibivo.weebly.com/uploads/1/3/4/3/134353446/2312710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458389/normal_5feaefdee5684.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/7733590.pdfIn PDF document text
    • https://kolabobinojojiv.weebly.com/uploads/1/3/4/8/134880551/2099582.pdfIn PDF document text
    • https://gimelukisisira.weebly.com/uploads/1/3/4/0/134040832/389731.pdfIn PDF document text
    • https://xizerusepu.weebly.com/uploads/1/3/4/3/134308384/cade2fe00123.pdfIn PDF document text
    • https://satiragekawojiw.weebly.com/uploads/1/3/2/7/132740750/1549280.pdfIn PDF document text
    • https://sawotulexude.weebly.com/uploads/1/3/5/2/135298589/db032436b59bdf.pdfIn PDF document text
    • https://sinaxerepedosuj.weebly.com/uploads/1/3/1/3/131398545/0e585e0c.pdfIn PDF document text
    • https://sedarujewajoto.weebly.com/uploads/1/3/0/9/130968957/a212d2187e53cae.pdfIn PDF document text
    • https://kabuzelegogem.weebly.com/uploads/1/3/1/4/131453274/paxukavubuw_nuluwuvi_sixiwelidekum.pdfIn PDF document text
    • https://renijavodis.weebly.com/uploads/1/3/4/7/134709946/pimobalikexifafepos.pdfIn PDF document text
    • https://rigugoxa.weebly.com/uploads/1/3/0/7/130776225/510557.pdfIn PDF document text
    • https://pizufugutim.weebly.com/uploads/1/3/4/7/134723530/9381291.pdfIn PDF document text
    • https://dofidosuxemaxej.weebly.com/uploads/1/3/4/5/134595751/tejuv.pdfIn PDF document text
    • https://wavoxodasamemat.weebly.com/uploads/1/3/5/3/135348105/729997.pdfIn PDF document text
    • https://wipiduwofudozi.weebly.com/uploads/1/3/4/5/134588456/mudumu_zafelap_kidadanuzefogig.pdfIn PDF document text
    • https://dofufegudi.weebly.com/uploads/1/3/1/3/131381881/vagonalebaxose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404285/normal_5ffb3d885647e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424981/normal_5feb1c225a0ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF905 5128 bytes
SHA-256: fdd0029c81d6f63fed5d3da355b524bcd26efafaf2388e27c7b71a05f6ac5ed3
font_01_sfnt_off00010a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A68 10936 bytes
SHA-256: 0a776844dd0d73889896e4f47314135df08c4e1c12e648ff83c0aa209e4a9001