Malicious PDF — malware analysis report

Static analysis result for SHA-256 c053a1da8db826a0…

MALICIOUS

PDF

135.4 KB Created: 2021-03-13 15:04:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d361b29b92cc06bd18a81e1ee6dbad7e SHA-1: 95b2a833abefbcce3262de0e029bbc74c1cf79f1 SHA-256: c053a1da8db826a0d5997f9def3988cf5e134ffa4496e2159dd69b21f720c691
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=star+wars+saga+edition+revolutionary+rhetorica PDF link annotation
    • http://unlockdeals.shop/how_to_use_duraflame_infrared_heaterdt9xw.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/51381111268.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/game_of_thrones_box_set_amazon_prime.pdfIn PDF document text
    • http://tilosag.mypressonline.com/ecg_rhythm_interpretation.pdfIn PDF document text
    • http://zoosalon.org/kufujosajekezaguvogodup2n4jf.pdfIn PDF document text
    • http://voztrans.ru/star_wars_soundtrack_torrentktw1s.pdfIn PDF document text
    • http://hamlikjorettoop.ru/7.3_4r100_transmission_for_sale4ig2g.pdfIn PDF document text
    • http://nefupanono.mygamesonline.org/vazajev.pdfIn PDF document text
    • http://bexixibeguben.sportsontheweb.net/the_hunger_games_catching_fire_novel.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/ad9c7567-547d-436e-82c8-24bd0472887d/jowezarudebamimokanak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5f2c30-2b2f-416c-a02b-9a635ad3cbab/jitakuliterurumuwiruve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5b2d4b-7886-48b0-8b5f-71ab01b1c42f/71951726526.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/silence_of_the_lambs_trilogy_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/753a7ee4-c1a5-4b26-81b9-5128fd09be8c/the_secret_garden_powderham_castle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce0049ad-d362-4d8a-a755-3a6ae7324e6c/what_is_the_best_diet_for_brain_health.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d9a538-842a-4acf-9e2c-244217ffde21/saravexelitumupitixafix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e19acea-1d89-4747-b44a-4e5ddaf0033d/how_to_write_a_news_article_sample.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/hp_photosmart_7960_driver_download_windows_8.pdfIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/61464286357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a55236-e73d-4c9f-9f92-abe0d1408f9e/black_steel_pipe_fittings_near_me.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/matlab_for_loop_matrix_elements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1492e553-93b0-4d98-8135-f9d1272fa620/kettlebell_training_pavel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac0460d-36e2-4ea4-9c00-f9911c898820/31077426267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8614e9-0545-4b17-8cd9-689ffc84d03f/mitsubishi_tv_model_wd-65638_owners_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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4A6 5556 bytes
SHA-256: 6d697a9391998f1e4258dba443eeef18ef4e062f29c6b17ff693fb7eed705f49
font_01_sfnt_off0001e79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E79F 11292 bytes
SHA-256: 8b89adfd3e260efee573b560ea629d4ba6b9f95a9d31727e651cd8f47c04e825