Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd7743da7afa0f7…

MALICIOUS

PDF

112.2 KB Created: 2021-05-26 06:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d100a7c6ef4976880e249fc7d43fe320 SHA-1: 62001a9b87d6296fccc0d08be5272736ae7c4088 SHA-256: fcd7743da7afa0f75c203f68b5498c10f17edfba3db4075b3b2b3c4666297ffb
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a significant number pointing to Weebly-hosted PDF files, indicative of a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=astrology+book+in+amharic+pdf
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/fobegolulomixop_buxofub_mudazalu.pdf
    • https://zunifoxorim.weebly.com/uploads/1/3/4/3/134320692/62edc786d81b0c.pdf
    • https://memumijakularaj.weebly.com/uploads/1/3/4/5/134507661/sokuguxun.pdf
    • https://static.s123-cdn-static.com/uploads/4378857/normal_5fcc60b8c0450.pdf
    • https://pozusope.weebly.com/uploads/1/3/1/4/131453674/xokizolapa.pdf
    • https://tejifogigevavep.weebly.com/uploads/1/3/4/6/134675995/db078e6a5ab8.pdf
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/8085142.pdf
    • https://cdn-cms.f-static.net/uploads/4401972/normal_6042f6ed69d48.pdf
    • https://cdn-cms.f-static.net/uploads/4454047/normal_6037d6f63230e.pdf
    • https://xixefofitajeres.weebly.com/uploads/1/3/3/9/133999179/badizalumunotofazadu.pdf
    • https://static.s123-cdn-static.com/uploads/4414172/normal_5ffcf3a0c76ec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • https://uploads.strikinglycdn.com/files/7fd909af-5fc4-4ae8-b238-50ebe2e47584/sokonuxegarimebunivotibi.pdf
    • https://uploads.strikinglycdn.com/files/eebe1c6c-6ecc-4cb9-b3b2-50d74f89df48/5359905190.pdf
    • https://uploads.strikinglycdn.com/files/c085b92d-f1a9-466e-bca9-0fd3391422d9/playstation_gold_headset_usb_replacement.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/formal_dresses_for_sale_online_south_africa.pdf
    • https://s3.amazonaws.com/sabobenuwe/itunes_windows_without_microsoft_store.pdf
    • https://s3.amazonaws.com/safago/athleticare_physical_therapy_sports_performance.pdf
    • https://uploads.strikinglycdn.com/files/ebcc1c73-b10c-439b-a02c-bce8a558b5c8/us_air_force_ranks_chart.pdf
    • https://s3.amazonaws.com/sulasatevirexo/redhead_gun_safe_manual_electronic_lock.pdf
    • https://s3.amazonaws.com/jexijer/classic_wow_druid_tank_leveling_guide.pdf
    • https://s3.amazonaws.com/kumasala/77113017961.pdf
    • https://s3.amazonaws.com/zumomasugipeno/carrier_homeowners_registration_form.pdf
    • https://uploads.strikinglycdn.com/files/af60b21e-54c3-4e35-a84b-1bf8b7df2841/how_to_play_cards_against_humanity_online_via_zoom.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • https://gitlab.com/smc/meera/blob/master/COPYING

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011139.bin
62c812e38e9f31ee613728bf2ff19ceba4e251862e1a9e72b893127fbd944a87
pdf-font-stream PDF embedded font (sfnt) at offset 0x11139 8904 bytes
font_01_sfnt_off000128a7.bin
1b366b68678ec68d11771bd9bba13cbccf5c2ca2fc9fcef10dd24bfc4a67911c
pdf-font-stream PDF embedded font (sfnt) at offset 0x128A7 5864 bytes
font_02_sfnt_off00013c73.bin
c3122ad0e0837087f521fdc209c062f308cc2f8379545d800dbbf2f44b37f570
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C73 3188 bytes
font_03_sfnt_off000148d7.bin
b15478137d64d97876b45765b084cd27fbf516f1ad506cbacd1f3696b99d1779
pdf-font-stream PDF embedded font (sfnt) at offset 0x148D7 14588 bytes
font_04_sfnt_off0001742f.bin
0b52f8a6a329a47af3130a47932c1c5a20bc0d70b17585f6794bc1e699128191
pdf-font-stream PDF embedded font (sfnt) at offset 0x1742F 3028 bytes
font_05_sfnt_off00017fab.bin
1f6aeda88a5e3c63a011975f66859ff0972a3c273954e83c67576d05c7e34753
pdf-font-stream PDF embedded font (sfnt) at offset 0x17FAB 2564 bytes
font_06_sfnt_off00018ac4.bin
8f94341ec6ac0b303a0b45a6e9182324635fb048fc527cedec873c00bedb0ceb
pdf-font-stream PDF embedded font (sfnt) at offset 0x18AC4 10852 bytes