Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1dbe57e7309e55c…

MALICIOUS

PDF

81.6 KB Created: 2021-03-15 05:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5c88ccf8accfd2cc8351c11fd3f9d0a5 SHA-1: 95ae65eaac3a39401f753f31d509bfb13e90141c SHA-256: d1dbe57e7309e55cd52c4c63aec44ed838db3fd8057eef2fb3c4568c26510b42
126 Risk Score

Malware Insights

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

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 0.9954

Heuristics 5

  • 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.
  • 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://jacksth.ru/strik?utm_term=how+to+use+pressure+air+fryer PDF link annotation
    • https://bazunebusa.weebly.com/uploads/1/3/5/3/135397504/mawimuxij_gofawotatib_guvulovap_lipexofej.pdfIn PDF document text
    • http://fipagolanikobax.mygamesonline.org/mazaliruxugikepe.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/3ZSFmSN/online_music_visualizer_video_maker_free.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/bgjIzhe/kung_fu_panda_4_cast_eminem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_604213e08bf0c.pdfIn PDF document text
    • http://erkutungotu.com/38820872752crfe8.pdfIn PDF document text
    • http://amandeepsadyora.com/mixuxijxeqi.pdfIn PDF document text
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/tikuxowud-gezusufokigi-jumufuziwiri.pdfIn PDF document text
    • https://tipuxefisabe.weebly.com/uploads/1/3/4/8/134846761/tikew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486772/normal_60246fc3eefd3.pdfIn PDF document text
    • https://funotagikaxu.weebly.com/uploads/1/3/1/8/131857914/bajemoguvaguta.pdfIn PDF document text
    • https://cdn.sqhk.co/menodotitit/cJkzlhj/gravity_movie_plot_synopsis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5fdd9e2633c2b.pdfIn PDF document text
    • http://kyrgyztours.com/9342591946njpoo.pdfIn PDF document text
    • http://50offit.pro/dumitanuzavekezinifixi92lgg.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/djbhivm/best_slasher_films_on_shudder.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/6ifjeCm/92115909041.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/is_the_galaxy_a10e_a_good_phone.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/57488212322.pdfIn PDF document text
    • http://airned.ru/lexatipafogugasyek3g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4b661d82-37ff-4d62-a8d9-ada2c2e630ea/the_future_of_life_wilson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c595c350-10ec-4d67-8f28-e6315be9a856/cuntos_habitantes_tiene_la_ciudad_de_mxico_actualmente.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/625b41b9-51a9-49c0-89af-65aacf9fc637/zenenugigapukofeni.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/pedivukonorebimatok.pdfIn PDF document text
    • http://neketepa.myartsonline.com/fidodawolinufupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05763200-bc9e-475f-8884-5aebb14e63c4/kuvujaxo.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_off0000f3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C8 4792 bytes
SHA-256: 2bc01bcdcd2256c411b3951eb8c9ec462fa619d803e5753e28eae8eff4eb91ca
font_01_sfnt_off00010445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10445 11612 bytes
SHA-256: d48d3064922f7cb08aa858b96324bcd0c9638d1dac7288e41c3829bc775a18ea
font_02_sfnt_off00012aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AED 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333