Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b3eee19cb00145…

MALICIOUS

PDF

76.3 KB Created: 2021-03-22 06:08:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9a69434b56075629864e8677ddaef2da SHA-1: 1217e6e78c723e084e9f98b01fb1aedd022944a3 SHA-256: 69b3eee19cb001456f68449c6e3d41909e893ae2d1285a06061f652d4a8139d5
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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.
  • 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://crophysi.ru/award?keyword=adjustment+definition+pdf PDF link annotation
    • https://sunajojafexa.weebly.com/uploads/1/3/1/8/131856627/guginesomipurawub.pdfIn PDF document text
    • https://wobifezoredeju.weebly.com/uploads/1/3/5/3/135323063/9450959.pdfIn PDF document text
    • https://sawifotu.weebly.com/uploads/1/3/4/5/134597463/jimoribo-wabajule-morewuki-sudipap.pdfIn PDF document text
    • https://cdn.sqhk.co/sijaxovada/gfgeN3r/can_you_use_airpods_pro_with_android.pdfIn PDF document text
    • https://lonawapusar.weebly.com/uploads/1/3/0/7/130776864/5956004.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/stock_market_crash_canada_1920.pdfIn PDF document text
    • http://abreudesigns.com/21096215239xsod.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/E2jgoig/9580072497.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/mage_the_awakening_rulebook.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/je8tijA/list_of_flags_all_over_the_world.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/hagd5e8/40958649380.pdfIn PDF document text
    • http://proba7.xyz/does_costco_canada_sell_sodastreamb35qx.pdfIn PDF document text
    • https://sosufafa.weebly.com/uploads/1/3/4/8/134862430/ad477ffd5a3.pdfIn PDF document text
    • http://gratoramaa.website/bubble_shooter_4_gameu8xtb.pdfIn PDF document text
    • http://esagafow.fun/53501278177rrv9q.pdfIn PDF document text
    • http://tiwilofojifig.sportsontheweb.net/what_is_philosophy_of_nursing_education.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/daxemo/24170836992.pdfIn PDF document text
    • https://d73c234d-0e3d-497d-8108-d5659bace061.filesusr.com/ugd/58a813_ad46223cdfe74b349c13fe1179b990b3.pdf?index=trueIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_42f60e1c0158465cace9b313991c58a9.pdf?index=trueIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_fffea3f15d5f411683436d1b952ff8b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fibesezati/android_versions_usage_statistics.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/henry_rollins_get_in_the_van_ebook.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_off0000ee98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE98 4916 bytes
SHA-256: 16bc9e12ea111a01e8bcbaa39f423bc81c01e30fc6434cd6d479b4bfb9fccb18
font_01_sfnt_off0000ff4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4D 10752 bytes
SHA-256: e13c50cc187bff3bb90cab74ca8d4af669d1a45700563b96c76275c82352172b

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