Malicious PDF — malware analysis report

Static analysis result for SHA-256 82aaa67af0483d63…

MALICIOUS

PDF

78.7 KB Created: 2021-04-22 06:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8d699ec75b4278cae6fcc71dc8b1404e SHA-1: 5218cf7cba7d91857462780e15950349aa95c22c SHA-256: 82aaa67af0483d63f965f69e528f0275e2dc9a281de902ae098428ea608d4017
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=maytag+maxima+dryer+installation+instructions PDF link annotation
    • http://stnold.com/no_eye_has_seen_nor_ear_heard_nivx5z27.pdfIn PDF document text
    • http://cleanup-sale.site/rheem_22v40f1_pilot_assemblyacf33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_603998b82530e.pdfIn PDF document text
    • http://1xbets-reg.site/what_fast_food_is_giving_free_food334j2.pdfIn PDF document text
    • http://yourdesk.website/the_big_picture_sean_carroll_free_download0vhtj.pdfIn PDF document text
    • http://wuwibapuwete.22web.org/44424171824.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375909/normal_5ffb26f921803.pdfIn PDF document text
    • http://tradebot.space/dnd_5e_magical_secrets_picks214b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://66ce1c92-167a-49d0-a058-8ecba4f8bde6.filesusr.com/ugd/3835dd_969fe5be9a8c4c5785f64427ec9dabd9.pdf?index=trueIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_9e2d41d3496d4aeb82169791dee4fe57.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda34411-ae6e-457b-8692-de198971b570/rigomebaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ca60c5-e7bd-44b0-95ad-b2ae93c2f9c9/strength_faith_build_dark_souls_2.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/jogobagemokalimegimakewaj.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_e570d07501c34f1dad33a799900f3ec0.pdf?index=trueIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_145a3636b86d4b4d940d651c3656ebb1.pdf?index=trueIn PDF document text
    • http://xekipeme.rf.gd/kajaria_tiles_catalogue_2020_free_download.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_f013cc9f5dc5486d9b98922436027da4.pdf?index=trueIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_b236fdc9d99a425491d234cc7919a7ed.pdf?index=trueIn 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_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 5436 bytes
SHA-256: 66fa276240c51625118cbcf4e389762c66e898f4e59de14f070ad3f6a652753e
font_01_sfnt_off00010748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10748 11556 bytes
SHA-256: 74e8b0436b36d03d3496cc58b5b41b63041609ac935c853391ee843315108b65

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