Malicious PDF — malware analysis report

Static analysis result for SHA-256 945b066f165d6188…

MALICIOUS

PDF

88.8 KB Created: 2021-03-28 00:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8e4060fc1dd470fe94f14f2d3d419dcb SHA-1: 10350e32fac7c2f13da89cbf3157cd15b44a5a12 SHA-256: 945b066f165d61882f199645246e68ca78c8b79e5cf5ad4f3d2e00a83a3005a0
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 0.9983

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://bologen.ru/award?keyword=vocalise+violin+pdf PDF link annotation
    • https://wanomumopanud.weebly.com/uploads/1/3/1/3/131379193/1992863.pdfIn PDF document text
    • http://liginirudusupob.22web.org/attunity_replicate_express.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/felowiritefasuxal.pdfIn PDF document text
    • https://pavimukafimedab.weebly.com/uploads/1/3/1/4/131483282/bfb3eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475987/normal_5fce36a278d21.pdfIn PDF document text
    • https://kilekawu.weebly.com/uploads/1/3/4/8/134857711/c7543d7188b7a.pdfIn PDF document text
    • https://xaminipa.weebly.com/uploads/1/3/1/0/131071220/bonixefazusemubinaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_602cd7cc658d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_603c56c40429b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_6041c4598b9da.pdfIn PDF document text
    • http://napodosawukezob.getenjoyment.net/vufosulukoxed.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/2960ce1c7cb2c.pdfIn PDF document text
    • http://dasoxugodomige.22web.org/32974777171.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/hero_honda_pleasure_carburetor_tuning.pdfIn PDF document text
    • http://tuzupibu.scienceontheweb.net/biografi_jenderal_ahmad_yani.pdfIn PDF document text
    • https://sakixori.weebly.com/uploads/1/3/3/9/133997256/napitav.pdfIn PDF document text
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/4802955.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://romevakamijoke.epizy.com/dave_ramsey_financial_planning_book.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/dujogolekorivivumumix.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/journal_of_addictions_nursing_author_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/nursery_rhymes_video_for_mobile.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/monster_girl_encyclopedia.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/dharm_adhikari_full_movie.pdfIn PDF document text
    • http://pimubejat.epizy.com/human_rights_watch_world_report_2019_guatemala.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46C 4784 bytes
SHA-256: c783bab1952f017df2534b2386f4c2d76b18d0aed5228808a348cbdf4618937a
font_01_sfnt_off000104b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B9 15076 bytes
SHA-256: 80abe7399f58aa07858c00fa89d137e627bcda5933a6ab28d3bc91fcaaea3efb
font_02_sfnt_off0001333f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333F 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61
font_03_sfnt_off00014809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14809 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2