Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3446dce73862be6…

MALICIOUS

PDF

73.4 KB Created: 2021-03-09 14:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 258c0a91eaba9887378c5c0160a0ef23 SHA-1: d072a430300f6de7868d861f9aca3e3643ffe314 SHA-256: e3446dce73862be6099a3c6ed0003c5e852b4fa046083e5b4848dcf574230a3f
184 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://midufefew.ru/award?keyword=calendario+festivos+madrid+2020+pdf', is presented as a search result, indicating a lure to redirect users to potentially malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8641

Heuristics 5

  • 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
  • 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://midufefew.ru/award?keyword=calendario+festivos+madrid+2020+pdf PDF link annotation
    • https://patoxudiza.weebly.com/uploads/1/3/0/7/130739147/1031986.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/kazexifunarotopi.pdfIn PDF document text
    • https://bafumujem.weebly.com/uploads/1/3/4/4/134498711/wadaxexolizagir.pdfIn PDF document text
    • https://xanuvewetarew.weebly.com/uploads/1/3/4/7/134732967/c927a512bb9d8.pdfIn PDF document text
    • https://nimudizovif.weebly.com/uploads/1/3/4/4/134478886/subabuxupo.pdfIn PDF document text
    • https://zimuvudiredefux.weebly.com/uploads/1/3/2/7/132710782/lamefekadipif_mareje.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/1517570.pdfIn PDF document text
    • https://figuzejigof.weebly.com/uploads/1/3/4/6/134644002/letafikorulaxekomi.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/4XhjEjf/xixiresewixononov.pdfIn PDF document text
    • https://cdn.sqhk.co/rowofabuf/gigd0GX/2992234019.pdfIn PDF document text
    • http://xebajar.22web.org/lisejegafixarewofusezigot.pdfIn PDF document text
    • https://gatuniku.weebly.com/uploads/1/3/4/0/134097356/00c74104559fa4.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/buzurix_zewurakoni.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/h2Pjdm8/kingdom_builders_church_international_beasley_lane_charlotte_nc.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/woBrNji/fireman_sam_helicopter_coloring_page.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/91271592271.pdfIn PDF document text
    • http://xalanijowule.rf.gd/loyalton_weather_report.pdfIn PDF document text
    • http://tewidunutazi.rf.gd/lagu_april_showers_aimer.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/wogatujemepumufedavanur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/976c5c61-3771-4934-bdb6-2665232a6dfc/my_kindle_wont_charge_or_turn_on.pdfIn PDF document text
    • http://xetagilijuf.epizy.com/sazepadojufadidavajo.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/7310336412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fed8179-da24-4e57-af32-8253792bed8f/63276287070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71daa55d-0d2d-4687-9196-018006080bd1/jivolafedonaleseni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d283cc-9fd3-4c79-a579-59e52a65d8a7/a_series_of_unfortunate_events_movie_cast_then_and_now.pdfIn 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_off0000e519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE519 5428 bytes
SHA-256: a5620436d0b781f99f92000de380f5bdecacf8a19e1835417b3bc1fb2210acf5
font_01_sfnt_off0000f77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77B 12468 bytes
SHA-256: 55de212b6852d7ca24ea872a92111055b197ea26cf6e45bcb5b0aa82929aaf83

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