Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c268778a176ef1c…

MALICIOUS

PDF

70.0 KB Created: 2021-03-13 22:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e021d45166c95d7b9b33b029943893f1 SHA-1: da6c34eefc358b14e0b8e3c7fffc7029035c5000 SHA-256: 9c268778a176ef1ce6044a1cf7497987b9f73da487e3d097ec76c051e5860ca8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of a large number of external links, including a link farm, suggests an attempt to direct users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/wix?keyword=pizzazz+math+book+b
    • https://cdn.sqhk.co/kigimole/gc9ibLY/toddler_words_beginning_with_d.pdf
    • https://cdn.sqhk.co/rodesedaded/hjz2hj6/real_steel_world_robot_boxing_unlimited_game_download.pdf
    • https://rirokenu.weebly.com/uploads/1/3/5/3/135349909/zubex.pdf
    • https://cdn.sqhk.co/dogutadova/fjhv2jj/72687859412.pdf
    • https://cdn.sqhk.co/velizovatim/j1jjXE7/sisters_oregon_weather_hourly.pdf
    • https://cdn.sqhk.co/suxepemup/gphgahb/history_of_the_universe_answer_key.pdf
    • https://sojopukav.weebly.com/uploads/1/3/4/2/134266177/xovutojigusez-joxolunekobaz-wovikarudi.pdf
    • http://kinemulawaw.sportsontheweb.net/bangladesh_detailed_map.pdf
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/25d8a4ae9e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://naxesabefadufu.atwebpages.com/weloza.pdf
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_915b75c49d024461b2817e1e7de2d05f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4d258dae-a705-456a-9c5b-73d4c3b3d722/44503235780.pdf
    • https://uploads.strikinglycdn.com/files/daabbc6b-4d5f-46a7-bc3d-3d6f1a0919b5/what_is_object_oriented_programming_in_java_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/e89db1f5-5998-4162-8127-3dc9d76861ee/how_long_i_have_to_wait_to_exercise_after_eating.pdf
    • https://uploads.strikinglycdn.com/files/56039118-bce5-4776-9a09-60f398459c67/do_ego_mowers_go_on_sale.pdf
    • http://tifavamifikas.myartsonline.com/giwiw.pdf
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_a7d3824be01c44d6a02b41d208e95bc1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/018c9f14-7fca-414b-b505-5ab34d7453ee/yamaha_rx-a730_no_sound.pdf
    • http://pivimufe.atwebpages.com/78842909232.pdf
    • https://uploads.strikinglycdn.com/files/a07e6cdf-7f78-4932-bdab-c096e5ab0be2/list_of_all_the_dummies_books.pdf
    • https://uploads.strikinglycdn.com/files/c66a8afe-81ff-4b51-a8fa-cea1768757e4/16566466602.pdf
    • https://uploads.strikinglycdn.com/files/a5b7c4e4-d166-4be4-aed5-11e5e8f7da7b/35781096300.pdf
    • http://nixomirorubu.myartsonline.com/lagexokofofenidovapegulo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d70e.bin
0642c398738db2b78edd01625ad08ec3288ad9adbfcea434634f8bcb471ea4f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD70E 4876 bytes
font_01_sfnt_off0000e78d.bin
41d48d35b783157cad0fc10872c22e1094a4b5ff487613d6af82ad7e754a454d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE78D 10332 bytes

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