Malicious PDF — malware analysis report

Static analysis result for SHA-256 0544ecf51e20cbdf…

MALICIOUS

PDF

81.2 KB Created: 2021-02-27 01:20:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e88ed1eef698ac864630bea128be21c8 SHA-1: 4818dce56d285e64ab043db0bc48e634c0bab374 SHA-256: 0544ecf51e20cbdf604a34b33299775b50fae2cefc2f8ed3bf617d72bef52127
156 Risk Score

Malware Insights

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

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 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/123?utm_term=casio+rangeman+9400+price PDF link annotation
    • https://cdn.sqhk.co/nazujovo/h7heagf/galaxy_guardian_space_shooter_game_for_pc.pdfIn PDF document text
    • http://eliyalte.com/oh_hear_those_sleigh_bells_ring_a_lingbglzs.pdfIn PDF document text
    • https://cdn.sqhk.co/poladejug/fijCiat/operations_management_air_force.pdfIn PDF document text
    • https://cdn.sqhk.co/wisisatofife/ChitCNV/gotcha_worldwide_friends_finder_chat_and_meetings.pdfIn PDF document text
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/46751e09c6045c.pdfIn PDF document text
    • https://radigaligoled.weebly.com/uploads/1/3/4/3/134333621/05e0e7c4ae820.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/if7hcf3/10239295724.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/vgejihe/spacex_live_fox_news.pdfIn PDF document text
    • http://cloudmarket.website/android_adb_start_app_without_activity_namelps23.pdfIn PDF document text
    • https://juxagoneponux.weebly.com/uploads/1/3/1/3/131384300/ea98d9b.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikureta/ggcicjb/kuteputi.pdfIn PDF document text
    • https://cdn.sqhk.co/jibezilesu/jh3gABo/age_of_empires_2_world_war_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/iPhjQmW/driving_school_simulator_2020_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvuvidova/5jaJBii/middle_finger_emoji_keyboard_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/ghTPVjg/sonny_bono_net_worth_2019.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/fedojigudaj/clear_individual_cookies_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/44168796454.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/char_broil_grill_manual.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000ecee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 6548 bytes
SHA-256: 4200db6c0e80cadcb5e6095e2db64c6b33cb2c0480475197fd4329a98774db8e
font_01_sfnt_off0000fd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD44 5512 bytes
SHA-256: f84a45ff1a3a59ff0b8e2d9c64d20fbd5fc084b03943d2ec8c6e4ea43ca4e350
font_02_sfnt_off00010fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEE 11192 bytes
SHA-256: ff98252c7828389e7b43af62352cd733ba628e2a435a254538673ac4d45a74dd

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