Malicious PDF — malware analysis report

Static analysis result for SHA-256 8970ff88d8e0d683…

MALICIOUS

PDF

82.4 KB Created: 2021-03-10 14:11:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5a5ed0c1b2a13c2d0a65b1f2e16487ec SHA-1: bf1f0b06cb25c3586c4c314c51dfd8413faa1ad1 SHA-256: 8970ff88d8e0d6834e18207ed27aaab904511f3991bbee6a7c6b4ecb2a8d30c7
134 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, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily corrupted, contains keywords related to downloads and forms, aligning with a lure to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/award?keyword=bhagavad+gita+tamil+book+pdf+download PDF link annotation
    • https://cdn.sqhk.co/wosipuvetot/eicN3gf/nvs_9th_class_admission_form_2021.pdfIn PDF document text
    • http://xifemimuxudita.22web.org/xedibulabi.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/Biajigj/npr_marketplace_piano_music.pdfIn PDF document text
    • http://fsbsiod.com/semidanasisotaxanilunai7ctv.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumirapeb/Thfgghj/lab_mouse_escape_game.pdfIn PDF document text
    • http://axecheat7.xyz/income_statement_practice_questions_and_answersinun1.pdfIn PDF document text
    • http://wisitens.online/describing_adjectives_listl1lyf.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/3f2njbj/bowser_nintendo_switch_parental_controls_ytp.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/dmCF8hf/shape_the_jelly_shift_race_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/vemoderama/e2xyjcs/cover_orange_players_pack_level_20.pdfIn PDF document text
    • http://storeyou.store/cpa_requirements_2017utdnk.pdfIn PDF document text
    • https://cdn.sqhk.co/pevizopubok/sHvYghD/titan_lithium_ion_battery_airsoft.pdfIn PDF document text
    • https://cdn.sqhk.co/retobumoki/9ibjbXs/galarian_zigzagoon_evolution_level.pdfIn PDF document text
    • http://bristol-yalta.run/how_do_you_take_apart_a_keurig_to_clean_itefmgc.pdfIn PDF document text
    • http://kvrovk.xyz/oracle_sql_loader_date_format_examplesihyqr.pdfIn PDF document text
    • https://cdn.sqhk.co/buwepexe/JFDDwha/46981608534.pdfIn PDF document text
    • http://quinzsy-studio.design/6.5_creedmoor_varmint_ammo_reviewgp8ax.pdfIn PDF document text
    • http://pubgucbayim.com/10466894250vtu3b.pdfIn PDF document text
    • http://myluckywin.site/halo_beyonce_pianopyhl2.pdfIn PDF document text
    • http://jajosez.iblogger.org/13567946807.pdfIn PDF document text
    • https://cdn.sqhk.co/putomikoluku/jeogggj/79838066441.pdfIn PDF document text
    • http://myluckybet.xyz/61600877851l2ug9.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
    • http://tudalumovadir.epizy.com/best_free_adventure_game_for_android_phone.pdfIn PDF document text
    • http://levewome.epizy.com/leralal.pdfIn PDF document text
    • http://lapukup.epizy.com/sudemabividojixotarate.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE391 5256 bytes
SHA-256: 965bbae8fefab733dd387a27c88005bff8fef84f2a781d7a5f816299fa734ba6
font_01_sfnt_off0000f564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF564 10136 bytes
SHA-256: 306e28c741cbeea9fb95866a766ba758827f5156cfaeacc68412f3ed241232c8
font_02_sfnt_off00011855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11855 16172 bytes
SHA-256: b6a6ca5d1ececf9b8f85cf34f243a5152d852bd6c46ff1fd844468d100e5349c
font_03_sfnt_off00012d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D71 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176