Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1219be30bde3ce9…

MALICIOUS

PDF

75.2 KB Created: 2021-05-06 12:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bf8195d340d3314e539a7f2e087d808 SHA-1: 2415ef0884217ac0aebe7ba4d416c5155543e179 SHA-256: e1219be30bde3ce90eded92db3598bae43ed02d1ec9ced3064d4d58f1341c2b0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external links, with a primary focus on directing users to 'pelibifir.ru' under the guise of providing specifications for audio equipment. The presence of many links on disposable hosting suggests a link farm designed to obscure the ultimate destination or to distribute various malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://pelibifir.ru/wb?keyword=shure%20blx24/sm58%20specification
    • https://gavofazipog.weebly.com/uploads/1/3/3/9/133999173/2269839.pdf
    • http://babusokojanog.sportsontheweb.net/92053165318.pdf
    • https://pegupirorig.weebly.com/uploads/1/3/1/4/131406852/pupawijijivub.pdf
    • http://kosonetibekub.medianewsonline.com/broadband_definition.pdf
    • http://fijexojor.getenjoyment.net/esl_beginner_questions.pdf
    • http://vonexalux.sportsontheweb.net/78755804342.pdf
    • http://noxavikadovul.mypressonline.com/powanuguzida.pdf
    • https://bopexetijajab.weebly.com/uploads/1/3/1/4/131411078/d36fa7.pdf
    • https://gigatadozewat.weebly.com/uploads/1/3/1/6/131606492/ligixikubomu_xagoj_suxatanokob.pdf
    • http://xemakaze.mywebcommunity.org/applied_behavior_analysis_for_teachers_8th_edition_free.pdf
    • https://cdn.sqhk.co/kalijada/Hhd19ji/sick_wid_it_crew_drop_tiktok.pdf
    • https://cdn.sqhk.co/dekaroku/jeewehg/4436378556.pdf
    • http://zobabikox.medianewsonline.com/bise_sukkur_board_result_2020_download.pdf
    • https://bevikafu.weebly.com/uploads/1/3/4/7/134710030/tiwusapinosor-fotatikejib-batagosa.pdf
    • http://tonedomopoja.scienceontheweb.net/called_out_by_barbara.pdf
    • http://kufafukedexepix.mygamesonline.org/niziv.pdf
    • http://zuzatew.medianewsonline.com/more_than_words_tab_songsterr.pdf
    • https://cdn.sqhk.co/runetonorox/dhdNZgc/gefomukakimapudonovazu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2bdb007e-e5f7-496b-9c02-245e1c5fc670/little_red_riding_hood_song_lyrics_amanda_seyfried.pdf
    • http://xologikaju.atwebpages.com/5572820717.pdf
    • http://vorisenunajix.myartsonline.com/comparing_volume_of_cylinder_and_cone_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/1e6cf911-a429-4ffe-893e-c84debe67022/sigidixesame.pdf
    • https://uploads.strikinglycdn.com/files/afe161bc-1035-494e-9dbc-b10ec297aa0b/why_did_the_renaissance_began.pdf
    • https://uploads.strikinglycdn.com/files/67543068-586e-4fb8-9a1a-e14d9a057c37/69740783652.pdf
    • https://uploads.strikinglycdn.com/files/e6ac86c2-0ccf-4849-bc81-3205cd0a0770/how_much_it_cost_to_replace_samsung_tv_screen.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e606.bin
9489b2e83eccf4fd478e260910c1a33d722480000fc45e03ddd714e922944dd8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE606 6140 bytes
font_01_sfnt_off0000fad8.bin
a84201bf8e2c126bee486c3c4e98477f092f0bfabe5a8b07b307dd2b1b1869bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD8 12060 bytes