Malicious PDF — malware analysis report

Static analysis result for SHA-256 582e0ef06b360a81…

MALICIOUS

PDF

123.4 KB Created: 2021-03-08 16:32:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0818db771d38cfa01a477eb5f34b03ee SHA-1: 56d87204487a3316241355bbe09d0fbf04dd8623 SHA-256: 582e0ef06b360a81259f31a9da653eec84812741348e487f1203dcb43492ae1f
166 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 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/123?utm_term=blue+mountain+capital+performance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414498/normal_5fdb1ba74e9f1.pdfIn PDF document text
    • http://leledup.mypressonline.com/jomifefofetuxoxulex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374024/normal_5ffcf7bc6e1de.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/gunujose.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/54707806344.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/percy_jackson_greek_gods_ar_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489834/normal_5fe63a2d65486.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/defipedibe/fagaxavetikatog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba827c3d-2678-48c0-8fa0-86d372364d19/fafasulaguke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6095afef-b3c9-464b-b930-342bb8b1d45f/kinonizuxatutojuni.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/36005211715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db86e581-d21e-41f4-a2cb-070ce2d33470/5102090759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b96d2a-1ccb-4453-ab5f-29e3db758ef6/the_magicians_book_series_lev_grossman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d98eace0-3f08-49e7-929f-cdccdffea393/come_follow_me_lds_videos.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/bexonuru.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/allophones_of_one_phoneme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6370244d-4da3-4e67-a767-c6f740c3d556/680302484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad42c842-6894-40e2-8d94-5381882f70c7/kuxip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb0895c-f2a1-4110-8450-a4279ee3dc86/la_formula_de_acido_clorhidrico_cual_es.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a686f99e-0b1d-485c-a1e0-6be0db8f1a07/dell_optiplex_9020_drivers_download_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/bajaj_allianz_travel_insurance.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/28093534395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f30c1fc-59da-4a6b-b3e1-0b6f2c1d5a4a/17767886328.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/mikezusixok.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_off0001a526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A526 5032 bytes
SHA-256: ab7810bc2ff06d7702c9f968ee9d4c43abf37ce217ac78a7055c5a7e81c85be5
font_01_sfnt_off0001b630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B630 12268 bytes
SHA-256: be9291ca09a7a414f87cc6fc581665e5bdc0019dcbd9af5e1305b8031a2a5944