Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf940a0c52fe0ea…

MALICIOUS

PDF

77.5 KB Created: 2021-03-14 09:34:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 83893cc726642b453ed108bd47f7b618 SHA-1: 21d9636acc7f4d08cbcfaabb1436f4f0d2142784 SHA-256: 2bf940a0c52fe0ea3996961ea586d81cf37c0396881e352c20600ddf297622aa
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://xezojetit.ru/strik?utm_term=bowflex+ultimate+2+price+new PDF link annotation
    • https://vomakitiba.weebly.com/uploads/1/3/1/3/131384058/41bee1d59c2.pdfIn PDF document text
    • http://good-production16.site/gorabakinorawinujonuginzbm7m.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/Tbejemy/82691959669.pdfIn PDF document text
    • https://pesopipuni.weebly.com/uploads/1/3/2/3/132303043/daf4bfa5d8.pdfIn PDF document text
    • http://adminhalil.com/advanced_trauma_life_support_protocolbgsg6.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/jhjanEj/maribazikaxoje.pdfIn PDF document text
    • https://zuwuroxiver.weebly.com/uploads/1/3/1/0/131070979/todotufowuro_fabaguvevove_nupig.pdfIn PDF document text
    • https://cdn.sqhk.co/begazopego/jhgcjgI/4_year_baby_learning_videos_free.pdfIn PDF document text
    • http://monoga.space/690235172h570l.pdfIn PDF document text
    • https://riguniliwegab.weebly.com/uploads/1/3/5/3/135342973/7daf79e86e.pdfIn PDF document text
    • https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/wegonasutegodafakuno.pdfIn PDF document text
    • https://nanupiwe.weebly.com/uploads/1/3/1/6/131606486/pajoferoriruz_nevesejox.pdfIn PDF document text
    • http://pogadai.xyz/futibomipugycnpd.pdfIn PDF document text
    • https://dovoviwum.weebly.com/uploads/1/3/0/7/130776035/manureziruzov.pdfIn PDF document text
    • https://mafetoga.weebly.com/uploads/1/3/0/8/130874134/bupilavoto-luzojijumoxi-rogosedegeb.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/900c9bcd50a6.pdfIn PDF document text
    • https://duxuxapuxud.weebly.com/uploads/1/3/5/3/135332588/5961389.pdfIn PDF document text
    • https://xegokefizu.weebly.com/uploads/1/3/5/3/135323464/lonoz-jiwiwodes-vonipufu.pdfIn PDF document text
    • https://cdn.sqhk.co/sugutomipu/eJ0qOgg/miranda_kerr_wedding_dress_replica.pdfIn PDF document text
    • https://wadaxoleda.weebly.com/uploads/1/3/5/3/135311928/1bec2f58a82.pdfIn PDF document text
    • https://keminozabigorez.weebly.com/uploads/1/3/4/8/134886120/pobob-tewemitaziwa-livexixem-wozesibuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_23e38ff8fb304a168205e50289196f1d.pdf?index=trueIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_5a1c49d0604344c1891f597e23dbe745.pdf?index=trueIn 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_off0000f185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF185 5324 bytes
SHA-256: 10946ba236dcf5a0268d9b11f38d6dc699951f443517b1b70cf51b815aa3e7ae
font_01_sfnt_off000103a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A8 10896 bytes
SHA-256: de2ea10f46f80a32ac8b07ade3506dcccf92599c5c8fb7c1e18cf4cd87b1d559