Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0d90ad5062e48c…

MALICIOUS

PDF

77.4 KB Created: 2021-04-01 15:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a44bb32c1734be285f3e600a98eca579 SHA-1: 12c43a9025b0b3560ac17be673abe85b984b1cc5 SHA-256: bf0d90ad5062e48ca6cf9d8d70ddad91d5f754340adb950b35104f377acb9417
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9960

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 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://mezovuduw.ru/wix?keyword=nickelodeon+alarm+clock+noise PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482638/normal_60653ddb098c9.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/9jhc7gh/ff_lock_screen_for_gameroom.pdfIn PDF document text
    • http://liketime.online/grundig_s450dlx_wont_turn_onsbldp.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/3KhaPgg/run_roo_run_app_store.pdfIn PDF document text
    • http://vajimojuregal.22web.org/how_many_irregular_verbs_spanish.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383922/normal_5fde4670d4158.pdfIn PDF document text
    • http://biweekamnf.com/pazijikozivifux6epi1.pdfIn PDF document text
    • http://nibelv.xyz/faiths_of_eberron_3.5fl9t0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_60120ca37ce6f.pdfIn PDF document text
    • https://cdn.sqhk.co/kapumikogux/4jdhcgf/98393562859.pdfIn PDF document text
    • http://ch-redirect.icu/food_and_beverage_basic_knowledge3fmao.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368219/normal_5fcbf1d20d5cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492918/normal_6052da2f9793a.pdfIn PDF document text
    • http://hhizmet.com/fovuwifexajokopelivifuwutxd69a.pdfIn PDF document text
    • https://cdn.sqhk.co/pajelidul/hjgjbig/52796911765.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/0vjhP6z/shooter_arena_mod_apk_unlimited_money_and_gems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mokimonanogi.rf.gd/cymatics_titan_free.pdfIn PDF document text
    • http://lexireto.epizy.com/nba_bleacher_report_lakers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f74f9e2-f7fe-49ca-bf18-16aec538cc63/rstudio_basics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487ac417-f01b-4b78-ba8b-f712fe95c4a0/93626428864.pdfIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_e3fa0690d3aa4132977a0f57473bd898.pdf?index=trueIn PDF document text
    • http://maxabuxaf.rf.gd/50823489392.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_d60cc92e88904e6a8d5c51fa0f6529b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de8371f-9a76-4e6f-ab92-b6e4ba4b98c9/xuvuru.pdfIn PDF document text
    • http://piwunutid.epizy.com/speak_well_english.pdfIn PDF document text
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_55cb9ad930644c46a7a4209f551bf9aa.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_off0000f1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CC 5120 bytes
SHA-256: 09e354fafc48a694d0c0f0028124db9fd49c2a94728192c3ade9dfa4ed77347c
font_01_sfnt_off00010322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10322 10848 bytes
SHA-256: 78e99c02cc68d3e8bf6e3c2151c1ed0498aa1deea9ac00d1d2aea4351e095869

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