Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d2957de482b26e…

MALICIOUS

PDF

81.3 KB Created: 2021-03-25 13:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d9a5eecd28462d07072d59cd3146bcfb SHA-1: 19544f19c61b7b87c22a88ab5d7a2685b8b24781 SHA-256: 77d2957de482b26ec56b91805a4f9136be1978ee0376dc20a8709a06a11235ea
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 0.9993

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://fokemale.ru/strik?utm_term=how+much+does+rosetta+stone+cost+per+month PDF link annotation
    • http://mosomupusafebin.medianewsonline.com/77292338939.pdfIn PDF document text
    • http://piredvizhnik.com/60454149623sa4x7.pdfIn PDF document text
    • http://voicebftyi.com/6766619836t59at.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/lowrance_elite-5_ti_touch_combo_with_chirp_sonar__hdi_transducer.pdfIn PDF document text
    • http://mazanatur.space/54828327315qodtk.pdfIn PDF document text
    • http://subonus.ru/29464671236nehc9.pdfIn PDF document text
    • http://spainsale.pro/2010_mini_cooper_s_oil_light_resetfn3hr.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/rekorewexidiwo/44188966065.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/upsc_exam_details_in_tamil.pdfIn PDF document text
    • http://wuwedutukuw.epizy.com/salmon_fishing_reports_n_ireland.pdfIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_0f13561761e746fe9edfcebcca1c17c3.pdf?index=trueIn PDF document text
    • http://rulamiji.onlinewebshop.net/88946115039.pdfIn PDF document text
    • http://tokiwubamiwi.rf.gd/46372102588.pdfIn PDF document text
    • http://fawogalupa.epizy.com/rick_and_morty_dungeons_and_dragons_character_sheets.pdfIn PDF document text
    • http://xekuvazam.rf.gd/alfresco_document_management_tutorial.pdfIn PDF document text
    • http://sidumudopok.rf.gd/autodwg_to_dwg_converter_2020_crack_free_download.pdfIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_1e8240a5a7424e2f8caeef608b16ddc5.pdf?index=trueIn PDF document text
    • http://xigatif.epizy.com/a_whole_new_world_piano_sheet_music.pdfIn PDF document text
    • http://satosawinesuf.rf.gd/67084955041.pdfIn PDF document text
    • http://sirirowevaga.rf.gd/97891389012.pdfIn PDF document text
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_d2496520eba44fd99aeefe677fd39fa3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/what_are_the_different_cost_flow_assumptions.pdfIn PDF document text
    • http://gejiregi.rf.gd/machine_learning_free.pdfIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_a33ccb1e9b95414d80416cc4281d0c8d.pdf?index=trueIn PDF document text
    • http://sidovarodefomi.rf.gd/xutalegivexod.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD73 5332 bytes
SHA-256: 2c87725dd0a1f067f0b8b1e85b7bd841824fa24550a29eb8a1b3758e6fb9bc86
font_01_sfnt_off00010f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F78 11804 bytes
SHA-256: 097035fc403340ab3dd2bba7b0d2e89537baa95fb13452e11351178a84ccfa23

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