Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efbc5eda8da035d…

MALICIOUS

PDF

80.7 KB Created: 2021-04-06 04:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e15c7872acd5ad9486935cdf16e615b9 SHA-1: 9991a316803d8f194f33969a7d495f9d67e12916 SHA-256: 6efbc5eda8da035d44d0d5ed830210c38478c1a8d1b3d56323fe605e4e7b16f9
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded document body, though heavily obfuscated, contains keywords related to hacking and game cheats, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/wix?keyword=btd5+hacked+weebly PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4505699/normal_5ffb621787a47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_602b5871d78ff.pdfIn PDF document text
    • http://burivuvuju.medianewsonline.com/6858348902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451736/normal_5ff22666907f6.pdfIn PDF document text
    • http://xafawotilujos.mypressonline.com/algebra_and_trigonometry_sullivan_6th_edition.pdfIn PDF document text
    • http://vizemezezu.sportsontheweb.net/clasificacion_de_las_benzodiazepinas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_6013e3077610d.pdfIn PDF document text
    • http://xufonewujisos.scienceontheweb.net/vevadepodoz.pdfIn PDF document text
    • http://gelokan.sportsontheweb.net/los_angeles_chargers_schedule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fogaduvese.epizy.com/the_celebrated_jumping_frog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfcead1-a540-4c6b-a1b3-09c095180d23/50076884976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ade42924-ad88-434f-95f6-30f4d5a68838/diablo_3_ros_ps3_save_editor_download.pdfIn PDF document text
    • http://moliposapivar.epizy.com/3ds_max_character_creation.pdfIn PDF document text
    • http://pezamax.myartsonline.com/zarajizev.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/zenesafulujeva.pdfIn PDF document text
    • http://marojinoz.rf.gd/zixotalupozuvanimutexumi.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/will_a_1500_watt_inverter_run_a_900_watt_microwave.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/essays_of_warren_buffett_4th_edition.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/gadovefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1db26b0b-11ce-4ba9-ab85-a7fd8b7679fc/toddler_girl_clothes_boutique_near_me.pdfIn PDF document text
    • http://dosejugofifates.rf.gd/23295838297.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/libovefime.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/54315286661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f40407c-01eb-43d6-a0b5-ed2d7ba85480/casio_watch_5081_price.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_off0000ebb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB9 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 5324 bytes
SHA-256: d0d4c79a44c2c37e63bdad1d142cd9bd5fa86e08d02dd655b45623aa53365209
font_02_sfnt_off00010eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDA 11296 bytes
SHA-256: 50bd2b3aca303e872b2fa8bea0f7a96f5481e136e52eb0e2efb2aca45769a199