Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3d5381af75946b…

MALICIOUS

PDF

72.4 KB Created: 2021-03-25 02:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6e827b4f24a9dec2b1457e25efcb6ffe SHA-1: 85491add0a5d438617ebf4559dc071e329972517 SHA-256: ba3d5381af75946b85766b7c89abe75e96f3caacc77b74fe2e4ac5d67bd82510
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/wix?keyword=translation+practice+worksheet+pdf PDF link annotation
    • http://ledimpress.biz/the_secret_garden_2020_huluesvr5.pdfIn PDF document text
    • https://cdn.sqhk.co/tusenepobam/xiehieQ/ferazoxakivonimulu.pdfIn PDF document text
    • http://doweryklkq.space/13193808863cnxo3.pdfIn PDF document text
    • https://rixajijinuroje.weebly.com/uploads/1/3/4/4/134473879/e29afd86a806e3.pdfIn PDF document text
    • https://xekozetona.weebly.com/uploads/1/3/4/5/134508060/pixabirejamexid-borodagamos-zejamotunined.pdfIn PDF document text
    • http://gitaxodepa.iblogger.org/bloons_td_battles_pc.pdfIn PDF document text
    • http://mitidogifomasis.iblogger.org/37301913823.pdfIn PDF document text
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/tugixubosakosufaki.pdfIn PDF document text
    • http://vsedlyatebya.xyz/77124378940hffnm.pdfIn PDF document text
    • http://sekuweb.iblogger.org/welopiwovorimuxexixas.pdfIn PDF document text
    • https://fotofewoxa.weebly.com/uploads/1/3/4/8/134849098/cbc7b6ca5.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/ghjfhge/download_stickman_ninja_legends_shadow_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zewedazogiwake.rf.gd/acceptance_and_commitment_therapy_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7221d911-35c4-4ea7-a55a-1810d7cbc5e7/zepokutamose.pdfIn PDF document text
    • http://jiregaruxu.rf.gd/powerpoint_background_templates_hd.pdfIn PDF document text
    • http://dasilumenuf.rf.gd/1427693500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1be8e3-7c71-4665-926d-bc67becbf5b4/70540670723.pdfIn PDF document text
    • http://sarebabeb.epizy.com/roluxebulu.pdfIn PDF document text
    • http://xupumigix.epizy.com/what_is_the_meaning_of_the_unbearable_lightness_of_being.pdfIn PDF document text
    • http://xesogopobatobop.epizy.com/bullhead_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628fa1ff-5bcf-42a4-a0b6-4d59b97b0039/alexander_the_great_1956_full_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729d6cae-9a25-4dc6-84d3-e36a116aaa6f/how_to_hook_up_portable_air_conditioner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8806d9d9-ccef-42b2-9778-41cb9f8592be/50494836173.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_off0000e0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DC 5348 bytes
SHA-256: 95b66e1cf913f24a51bdd2773b985570fc895e6e89b069eb320ace47edadd212
font_01_sfnt_off0000f315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF315 9740 bytes
SHA-256: ccb97d7f968c621ed02debbd9a19504d2bac6a48939f5d89db1d331eb3b14d4a