Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4ed1a3a60e7e05…

MALICIOUS

PDF

78.6 KB Created: 2021-03-15 02:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aca1aa04671f88f8fb8bc759b299d799 SHA-1: 53ffd07139846d3bc9ba397add1a03c536180045 SHA-256: fc4ed1a3a60e7e05fc40607ac8982a7afaae4451e35c37537f42aa18d547f43b
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 0.9997

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/wix?keyword=suzuki+viola+book+1+pdf+imslp PDF link annotation
    • https://cdn.sqhk.co/pidagasew/hijcU8P/savewosikigimobazufajuni.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/KFjPVid/are_hair_salons_open_today_in_ct.pdfIn PDF document text
    • http://itayoga.space/11_human_organ_systems120b0.pdfIn PDF document text
    • http://get3creditscores.info/no_game_no_life_manga_volumesxfkxk.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/cIia931/tomatakukap.pdfIn PDF document text
    • http://oficialshoes.site/bhagavad_gita_chapter_2_verse_47_in_hindinb6lx.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/gdXyk4F/26005418299.pdfIn PDF document text
    • http://biomanix.best/sony_str_dh750_review92d14.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/bqjiexI/74808625648.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/super_mario_odyssey_emulator_ios2c5wt.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/qgjRbia/snake_puzzle_cube.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumabigige/hdZLYMk/riwunazigaliwebazuxirop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vewajelawukos.rf.gd/solaredge_55kw_inverter_datasheet.pdfIn PDF document text
    • http://nusilemil.epizy.com/sql_server_2017_format_code.pdfIn PDF document text
    • http://lunowakaneruf.rf.gd/besofepawurozug.pdfIn PDF document text
    • http://fivamoxopel.epizy.com/spider_solitaire_card_games.pdfIn PDF document text
    • http://daboloxasorun.rf.gd/14565775506.pdfIn PDF document text
    • http://juvadapirepaf.epizy.com/classical_gas_trumpet_sheet_music.pdfIn PDF document text
    • http://xaxibalese.epizy.com/where_can_i_get_my_bose_wave_repair.pdfIn PDF document text
    • http://wopugizejaru.rf.gd/70190075980.pdfIn PDF document text
    • http://tusagotimus.epizy.com/fufiwezudavob.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_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 5560 bytes
SHA-256: 3afbc27c79a47f7be0a46fe05c52d6ef94e6403cd455c537f6d355a937bfd443
font_01_sfnt_off000104c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C9 13812 bytes
SHA-256: 008e5c41d2c74370248f212c3aeac255f2b0172dfcedf984ddbf0d744b30aa55