Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ec7226aff867e0…

MALICIOUS

PDF

79.6 KB Created: 2021-03-02 05:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6e6a823f7f48ba4f5d45d01fe4ea0203 SHA-1: 095fcb84351a9742c2523afb513f0c8a81fef7c9 SHA-256: a4ec7226aff867e0161ae19c4a83f2dfca163c8a53ff112ba88592229ba9050b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=why+johnny+can%2527t+read+pdf+download PDF link annotation
    • https://cdn.sqhk.co/dowepigakaw/ijidjf8/guess_the_emoji_word_game_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/marezotije/VqgcYgU/viluwavujem.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/WgfbcJh/22067847055.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/how_to_put_my_essay_in_mla_format.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/jhdsgiz/basic_marketing_concepts_for_internet_marketing.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/LTzjhji/templar_battleforce_rpg_full_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/ghejdJx/road_trip_bingo_for_preschoolers.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/power_cooker_plus_cooking_beans.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/washington_state_high_school_basketball_stats.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448980/normal_5fc7c5dabcf89.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/what_is_the_9_box_model.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/Luyiihf/ginitatatafaw.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/3Bgjigp/gmod_addons_download_slow.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://s3.amazonaws.com/pomaxa/revealing_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/97296627884.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/25125897366.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/kapoj.pdfIn PDF document text
    • http://tofalit.myartsonline.com/17978704400.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/aerobics_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/waste_management_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/72901944871.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_off0000ee40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE40 5120 bytes
SHA-256: 3b7c6d72de838da6ed9bdd2cb77dda389152068098efe29785452a01ea8d4571
font_01_sfnt_off0000ffc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC7 10156 bytes
SHA-256: 2124e29604a940de43728e50675496fe225097fe59dfa67d731630f128e1397f
font_02_sfnt_off00012281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12281 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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