Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ae9e9dd7a99e4d…

MALICIOUS

PDF

71.0 KB Created: 2021-03-29 09:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 03b246cecb916262d5c6fdbb7d2bffa3 SHA-1: 7408f69b99bdcad2f966280ed634562252341115 SHA-256: e5ae9e9dd7a99e4d0f409f97611d33a8e63098cfa68a9d8507fde946c902ee6a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded content appears to be junk data, further supporting the idea that the document's primary purpose is to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=icao+aerodrome+design+manual+part+4+pdf PDF link annotation
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/2762577.pdfIn PDF document text
    • https://xemavuvewo.weebly.com/uploads/1/3/5/3/135394060/8318413.pdfIn PDF document text
    • https://bopunesarikimar.weebly.com/uploads/1/3/1/4/131453984/33974656eca483.pdfIn PDF document text
    • http://togaxifobuf.mypressonline.com/4594029862.pdfIn PDF document text
    • https://ziregezetul.weebly.com/uploads/1/3/1/3/131398138/fiferifuse.pdfIn PDF document text
    • http://papawugamajube.mygamesonline.org/tujufamapowapirupoga.pdfIn PDF document text
    • https://zidepodip.weebly.com/uploads/1/3/0/7/130775192/4200504.pdfIn PDF document text
    • https://salufisudad.weebly.com/uploads/1/3/2/6/132695294/ludabudutetik.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/top_250_movies_imdb_list.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/liwif.pdfIn PDF document text
    • https://vujanakisa.weebly.com/uploads/1/3/4/4/134401771/vizorutexejisugakek.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/dotakabobukinovolo.pdfIn PDF document text
    • https://gematisi.weebly.com/uploads/1/3/4/5/134599806/monekup.pdfIn PDF document text
    • http://lopixerirerenex.mywebcommunity.org/nosetudoketefonagipag.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/how_old_are_the_characters_in_dork_diaries.pdfIn PDF document text
    • https://mazerobuwi.weebly.com/uploads/1/3/1/3/131398334/8686065.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bugenuvumap.atwebpages.com/pdf_file_merger_software_free_download.pdfIn PDF document text
    • http://jilezogilizi.rf.gd/tapenekeguw.pdfIn PDF document text
    • http://gozudivigel.epizy.com/95924958256.pdfIn PDF document text
    • https://c4a0f302-b060-43a0-af10-a0364da5eca7.filesusr.com/ugd/c6d327_fbb0ea052d9b487b93f0a5e5a8b893cb.pdf?index=trueIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_47c879ce029645999bd57ae3236ada3e.pdf?index=trueIn PDF document text
    • http://fowimifefezujo.myartsonline.com/45223054395.pdfIn PDF document text
    • http://kadinox.epizy.com/temekojodenasotidokewini.pdfIn PDF document text
    • http://kemesid.onlinewebshop.net/bodyboss_ultimate_body.pdfIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_9dbf73a7caa84e668e4fe63770545ab7.pdf?index=trueIn PDF document text
    • http://dotejujuzobok.rf.gd/wonipexofugujusuxadolo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECA 5500 bytes
SHA-256: 8fc16e277fa49e5d86d4b0aca13fd706242036b33cb87f888c8d7cf22d46ad19
font_01_sfnt_off0000e16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16E 2044 bytes
SHA-256: 00e9c67b84577ee292276cd5de885299f23f5730b2327ee67451e1a4c0ce668f
font_02_sfnt_off0000eaec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEC 9992 bytes
SHA-256: ba3ec23a84283a03afc655f010bde89b6ea296e7725887d872a8c6ae205d4600