Malicious PDF — malware analysis report

Static analysis result for SHA-256 7838214ad754e665…

MALICIOUS

PDF

77.1 KB Created: 2021-05-13 07:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 533d675481f70ef458a50afed35bf6ff SHA-1: 1382ce1fd853eb09079356441c4f0ce2ef03b560 SHA-256: 7838214ad754e665ecea4e278c378239de56a977b141db044f05c7e49c397c46
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://maypoin.ru/strik?utm_term=how+to+create+organizational+culture+change PDF link annotation
    • http://50offit.pro/debtors_clerk_job_description_templatew9sii.pdfIn PDF document text
    • http://apparently-home.com/easy_vegan_recipes_no_carbs10ae6.pdfIn PDF document text
    • http://complect-tech.ru/what_test_strips_does_accu_chek_nano_use3gj4x.pdfIn PDF document text
    • http://graatorama.space/cant_see_kindle_fire_folders_on_pc29rie.pdfIn PDF document text
    • http://playmarket-online.com/glasswire_data_usage_monitor_pro_apkd71ms.pdfIn PDF document text
    • http://braco.ru/is_bible_coloring_app_freeodmzi.pdfIn PDF document text
    • http://gachihyper.xyz/35944578258549r4.pdfIn PDF document text
    • http://teasmall.space/by_the_waters_of_babylon_plot_outlinelqmij.pdfIn PDF document text
    • http://biomanix.best/2013_subaru_impreza_2.0i_sport_premium_reviewjj45f.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://btsworld.org/zobuzolixudibe17phh.pdfIn PDF document text
    • http://alfa-quest.ru/fakijafapolatalafur2l3s.pdfIn PDF document text
    • http://lozhobelir.space/xurabaphuxq.pdfIn PDF document text
    • http://magazok.top/95766170353r4lk1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakarajibap.myartsonline.com/afterlife_lyrics_ashe.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_9d5bf35fddf2448990a001616f07cf45.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cb750c4-e28a-4a0a-8712-e1896727a5ca/xavinilebixovixamumojivir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad3127e-d1d3-4d58-8d5d-0f4c2f96fedf/63455046304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed92a96e-1508-4623-9230-1db661537f4b/lazarillo_de_tormes_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f952fd-93e1-4769-aa45-d0bfead7dbde/captive_prince_trilogy_read_online.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/jutifopunumekujobawet.pdfIn PDF document text
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_ebdffed1746d43ac9c020bbc33d29610.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f082ef-8192-4c23-900d-5236341b4b90/kizotu.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_off0000f3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AA 4988 bytes
SHA-256: c62ab44a703f0d900843fdc9a0179de9edb092145941bc0585905ab9d653ae9c
font_01_sfnt_off000104b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B1 9844 bytes
SHA-256: 46d83418cdf85bbf53b8f29d4195945a7b88135da8e6de99211d51068a0ee2f3

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