Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5db5ea9b73494a8…

MALICIOUS

PDF

80.0 KB Created: 2021-04-05 11:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0966662529091bbf5aeb35b64ff28f8e SHA-1: 81c4e637853c261e4f5508c528f046cade8a6593 SHA-256: d5db5ea9b73494a8ac39ba91135d084cdc8015b4e71f501ec2dca8a15966ee18
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9997

Heuristics 4

  • 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://midufefew.ru/123?utm_term=tricky+english+grammar+questions+and+answers PDF link annotation
    • http://sivesesugipode.scienceontheweb.net/zonixidetawotedu.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdfIn PDF document text
    • http://hookup681.site/one_thousand_and_one_nights_summaryq49mf.pdfIn PDF document text
    • http://xinuvaro.sportsontheweb.net/20656933407.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/vatipafelodufixu.pdfIn PDF document text
    • https://cdn.sqhk.co/timemowab/jfRJhGs/splashy_dictionary_definition.pdfIn PDF document text
    • http://good-production20.site/68859789997dpi3b.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/icBWEhi/autobots_reunite_piano_sheet_music.pdfIn PDF document text
    • http://sale20.site/76435848530787a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc1c8d05-c60f-4cfb-8288-efca7f79a4a9/cutlip_and_centers_effective_public_relations_11th_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84e2f2d-43b6-4118-aeb3-37e51d5cceef/how_to_enable_cheats_on_sims_3_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/kagadikoraduvibax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1439d208-c4a0-4c27-9089-539753a97b86/solid_wood_office_desk_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/anesthesia_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0917b69-0dc7-4f78-9798-480d00ed699a/fotatebuvozepavasoma.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/el_principe_nicolas_maquiavelo_frases.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/480231393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50425150-8cbd-402f-b2fa-d343ffb9c578/ejercicios_verbos_irregulares_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/mental_maps_of_reality_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/60018209265.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/candy_blast_game_free.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_off0000f919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF919 5684 bytes
SHA-256: daee72e8c8266e7f59db55e0f7345a9b2fa895ac8aaae14bf8c83410bc6026d3
font_01_sfnt_off00010c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 11300 bytes
SHA-256: 0940dd6ec09f867e4bcd6b778e2596269c1419d7b38d58267486012af9c97dd1

Open this report in the interactive analyzer, or submit your own file for analysis.