Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15121f63e6c5e74…

MALICIOUS

PDF

76.0 KB Created: 2021-06-06 09:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0b6aac57da78d5aaeb0474cd08762846 SHA-1: 241c6f37f0cb1ff597fc9dc7fa624812c31bacd4 SHA-256: a15121f63e6c5e74857f945257d897844adae6d3af11bb16db58c775ad538672
156 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic, with one prominent link related to downloading movie files. While no scripts were explicitly extracted, the presence of external links and the PDF format itself can be leveraged to redirect users to malicious sites or download further payloads, aligning with common phishing and malware distribution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://huntic.ru/pbw?utm_term=rocky+kannada+movie+mp3+songs+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425256/normal_5fdb577f6e246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_60675d1855493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465539/normal_606e3001c9c63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_6062da309edcb.pdfIn PDF document text
    • https://netodidomaxamoz.weebly.com/uploads/1/3/4/3/134311991/47bae4f48173.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454575/normal_6001d5aeaa6e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448976/normal_5fed3dd81b82c.pdfIn PDF document text
    • https://nufujemirifo.weebly.com/uploads/1/3/4/8/134868255/3728055.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4501777/normal_60b0060896a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415327/normal_5fd14c0d1c1a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d640f9-6d8b-43d9-9490-b549a50f39f9/the_hunger_games_mockingjay_part_2_full_movie_download_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b036a8c2-0ee3-4f3f-abc0-3b896b0617a9/property_management_job_titles_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68440f2c-6e94-4d34-83c4-54acf4ba7652/resumo_do_livro_de_paulo_freire_pedagogia_do_oprimido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25baf527-a88c-4317-9cc2-9e6049fa3e63/kisidowakeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e36a5827-1b61-4aa6-b726-b017e48c2395/90662163432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621307ba-e002-41e2-8d9f-1394dad326a1/3_day_potty_training_book_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd768f3f-0f06-401f-9530-631084ea15cb/87069211549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/237e85cb-9e84-4ead-bbfb-022082912d62/43233150214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ae4648-4a92-4cc4-9981-044e01764f41/apple_ipod_shuffle_2gb_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79bc3c3-00e2-4797-8e15-c58cafbe0c3b/36814357460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d2d2a6-24af-42fc-b153-19aec1449eda/comcast_remote_code_for_element_led_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/288e8a78-8395-4cd1-ba47-381e0dbc2114/89256013248.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_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 5964 bytes
SHA-256: 40ef4a271b735d0bd9be62880105beca6870ef0049adab92f6513228c44609be
font_01_sfnt_off0000fdd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD1 10640 bytes
SHA-256: a7be2087bce5d2b88bc9330e7a2bca658d3b96f714789bcd5f1b80617b39c3fc