Malicious PDF — malware analysis report

Static analysis result for SHA-256 349d869beeb223f6…

MALICIOUS

PDF

81.8 KB Created: 2021-02-24 15:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c4ce2297b3ea4ff0baef1e95d246b3aa SHA-1: d01417590210e6534c681c3f36a93685a5ca8d60 SHA-256: 349d869beeb223f6584d0b1003c282f1de3bc76272742e13785918e5074ac4d5
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=cuanto+pesa+un+metro+cubico+de+hormigon+fresco PDF link annotation
    • https://sokowerifali.weebly.com/uploads/1/3/6/0/136053586/16704b46f04.pdfIn PDF document text
    • http://metalllift.ru/tinusilevelope7b4we.pdfIn PDF document text
    • http://vnds-v.website/17505635631j13i2.pdfIn PDF document text
    • http://bonusiotsbera.online/bifadiwenozu3vv07.pdfIn PDF document text
    • http://on-arenas.com/back-_on_discographyhkjpo.pdfIn PDF document text
    • https://pexipepokebi.weebly.com/uploads/1/3/4/6/134627497/tagigidev_tatitikibasa.pdfIn PDF document text
    • https://rojofasefimo.weebly.com/uploads/1/3/1/6/131636828/3a0733.pdfIn PDF document text
    • http://bonuwefuganagus.22web.org/wunijavokazola.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/2649918.pdfIn PDF document text
    • https://bopizuvobaz.weebly.com/uploads/1/3/4/6/134668398/8751120.pdfIn PDF document text
    • http://skidki-day.store/pedavukvt6nt.pdfIn PDF document text
    • https://bugupomulu.weebly.com/uploads/1/3/5/3/135396692/budewejijivomitijij.pdfIn PDF document text
    • http://rubisteq.online/how_to_start_a_music_business_onlineivehi.pdfIn PDF document text
    • http://kugamuwefula.iblogger.org/lalegasesidibedapewixuv.pdfIn PDF document text
    • https://tulaliferejuza.weebly.com/uploads/1/3/0/7/130775137/xagogadedutitipelid.pdfIn PDF document text
    • http://maslovauto.ru/55395137733ssa8z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://menivafanar.epizy.com/jagivuluvazamokapitad.pdfIn PDF document text
    • http://sexesivakolek.rf.gd/96035530686.pdfIn PDF document text
    • http://lamumabazekutum.epizy.com/sukixesobajusamolasoge.pdfIn PDF document text
    • http://zosajirigo.rf.gd/kifetapa.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_off0000fc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC66 5584 bytes
SHA-256: 5b3afebe4a51b38196f0d9c0cb9fb1c24518bd33e8c6253fc5a25797f067c6fe
font_01_sfnt_off00010f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F30 12628 bytes
SHA-256: 2b9038b9e6aedcd48917fcb69ce2c3c3530227d1337c0418099d173616ca9df7

Open this report in the interactive analyzer, or submit your own file for analysis.