Malicious PDF — malware analysis report

Static analysis result for SHA-256 4952c6c9c8584be5…

MALICIOUS

PDF

71.7 KB Created: 2021-03-13 14:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8b7700657ed0c9c648d7662e73c80e34 SHA-1: 1a834b032af4a9c41b415dbcfc058d52b39aaace SHA-256: 4952c6c9c8584be57f617639eb99e6972cf34c5068054ce5bce8434aae924f1e
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 0.9956

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://soxebez.ru/123?utm_term=beckman+coulter+j6-+mi+centrifuge+manual PDF link annotation
    • http://mivetys.xyz/73197197500rd3ii.pdfIn PDF document text
    • http://didazema.mypressonline.com/is_pretty_little_liars_coming_back_to_netflix.pdfIn PDF document text
    • http://letnesil.xyz/35532677866kxre9.pdfIn PDF document text
    • http://latencfsrt.space/alice_and_olivia_shoe_size_guideyp8o7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451229/normal_604b7825a95e2.pdfIn PDF document text
    • http://ita-talia.fun/supply_chain_management_courses_online_india3zx2v.pdfIn PDF document text
    • http://wersita.space/mediaf_re_minecraft_mods_bedrockostnr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377112/normal_6000a0378ab63.pdfIn PDF document text
    • http://metryck.info/97301490695q6lzo.pdfIn PDF document text
    • http://skout.tech/the_noble_quran_arabic_with_english_translation__transliteration47ba1.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/kuruvikipizanigabipor.pdfIn PDF document text
    • http://custits.space/22736147834se0lm.pdfIn PDF document text
    • http://tryse.xyz/728069659845te6y.pdfIn PDF document text
    • http://xivobivivupe.mygamesonline.org/autodesk_inventor_practice_exercises.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417995/normal_5fefaa1741331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493549/normal_5fe2251a99352.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/nuvukaxogudadoloseveropis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_601f5924a4e93.pdfIn PDF document text
    • http://load-bcp.com/48927546560nbeuw.pdfIn PDF document text
    • http://reduslim-siteofficial.site/metformin_l_gbma64.pdfIn PDF document text
    • http://marketeuro.pro/66941901414iroc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_05f740aa196242aea27f794aa8b4f4cf.pdf?index=trueIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_e5451534c06c4f91b4be7e4fc95067c3.pdf?index=trueIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_60e6c5dd7f7347e29bd43117b71836ac.pdf?index=trueIn PDF document text
    • http://jisijuvod.myartsonline.com/the_maze_runner_2014_full_movie_download_in_tamil_dubbed.pdfIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_863276248b804757b1694881e163b25e.pdf?index=trueIn PDF document text
    • https://148d48ef-a78d-4e34-a4d2-755cfbac042a.filesusr.com/ugd/ccca9b_de9bf4af52d64fa69d624c1fd8e82596.pdf?index=trueIn 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_off0000d776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD776 5396 bytes
SHA-256: 03bd63cf13c0ff5ef510cdea5465b5db4a1c364841af6053e78605dad2c78466
font_01_sfnt_off0000e9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 10944 bytes
SHA-256: c5c25687a2c128f991bab4fce125341d64f076d8f2706a7e59cdf8e26f9c57f7