Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed396eed857d2bd…

MALICIOUS

PDF

79.2 KB Created: 2021-03-19 02:25:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1804a2d788ee414a21063c25d4e6b4b5 SHA-1: ae921d3308d75da0a71dca98307d81f83849421e SHA-256: 1ed396eed857d2bd5925a4055e262c1b8530470d324c4e88feeadfd47999c772
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically pointing to a URL containing 'follow us on instagram sign template', suggesting a phishing or social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the 'link farm' heuristic further support that this document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pelibifir.ru/123?utm_term=follow+us+on+instagram+sign+template PDF link annotation
    • http://fukerijinexin.mygamesonline.org/scag_wildcat_parts_manual.pdfIn PDF document text
    • http://roxedizusugu.mywebcommunity.org/advanced_calisthenics_workout.pdfIn PDF document text
    • http://risurevisawibe.iblogger.org/how_many_stamps_do_i_need_for_local_mail_canada.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/13583608896.pdfIn PDF document text
    • http://kogemamumudun.22web.org/cincinnati_annual_weather_report.pdfIn PDF document text
    • http://firavowinoza.iblogger.org/78107875234.pdfIn PDF document text
    • http://bamejudodenor.iblogger.org/resident_evil_biohazard_game_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8180f05d-78bd-4a76-bc28-85dc6e910741/roxazes.pdfIn PDF document text
    • http://wifofevowogak.onlinewebshop.net/how_to_describe_the_sun_shining_on_your_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0692c40b-e824-482c-aa2b-7ea58559f297/walmart_open_tomorrow_morning.pdfIn PDF document text
    • http://datidogebe.epizy.com/63404907274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f04cd21-60e9-48f9-9c82-39b6ab73a9f5/78312440018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7051b093-6871-4a1b-a81c-ee4557e6439d/marvel_what_if_series_episode_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28205e2e-47b9-4d24-9060-f6c7aa134839/what_is_the_difference_between_so_and_because.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/pikolemugekanazurakux.pdfIn PDF document text
    • http://davojuke.epizy.com/wegasuniwukusonojapipelur.pdfIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_c56e8a7e4a3f408d88424d3e2b27dacd.pdf?index=trueIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_0c3a8820491641828686963660152686.pdf?index=trueIn PDF document text
    • http://lirinuguwe.rf.gd/xipup.pdfIn PDF document text
    • http://tokofom.rf.gd/12049660773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc156fa5-e93f-43da-a439-68c23ad414c9/76266357973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a679a51d-eade-4151-a849-a1fcfba18701/42847081926.pdfIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_bbfd0804a8f249d78e30765054e73793.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_off0000f650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF650 5188 bytes
SHA-256: b30ffa194707dae19cd7d635710b25fb88fc1618d12a00aa8ac0de81d38d9ed7
font_01_sfnt_off000107f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F8 11664 bytes
SHA-256: 721b03bb631acabe84ff2a513ada2c34479b067f2ffc25ab9a6b881c15586442