Malicious PDF — malware analysis report

Static analysis result for SHA-256 947582c15df6ed79…

MALICIOUS

PDF

74.1 KB Created: 2021-04-08 04:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 92d5d4e4f39d624d01e8270abe222976 SHA-1: 732cfc196e75837b1654664d3146f8d333d5e16d SHA-256: 947582c15df6ed7956b6ee20efc45bdbf24d7cd107856dbc2cc23f2f648aff94
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-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://jacksth.ru/strik?utm_term=asus+rog+crosshair+viii+hero+review+reddit PDF link annotation
    • http://ayazshabutdinov.club/how_to_use_instant_pot_duo_nova_pressure_cookgpw4z.pdfIn PDF document text
    • http://bratskpravojur.ru/p90x_workout_videos_online_free7xvol.pdfIn PDF document text
    • http://christinaanddavid2019.com/kuta_software_mean_median_mode_worksheets2fdin.pdfIn PDF document text
    • http://enots.space/shakalaka_baby_songhtvds.pdfIn PDF document text
    • http://herss.space/advertising_key_success_factors_marketing1ryfs.pdfIn PDF document text
    • http://nesobaka9.xyz/high_energy_particle_physics_job_rumour_milldmis2.pdfIn PDF document text
    • http://emmetrix.net/37856957858dur8t.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/54851908-4aa8-4f19-89dd-52c06a48f162/data_warehousing_and_data_mining_ppt_by_kamber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ba1811-b06b-44c8-9f0a-774f4b1733aa/97277354674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b03f84-a59c-418b-a710-48cec2f5f43d/what_is_the_next_book_after_discovery_of_witches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e906a009-3b49-46ea-96ee-176eed97b39a/13974794393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b4693d-b2ba-4e79-a0c0-adddbda06f01/aa_chapter_5_original_manuscript.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/82465560840.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/12448618117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b72ea4-a66f-4955-9c5a-06b402eeb58c/12755902089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3cb11be-84f0-4e1e-b09a-5677c6bec90f/2632148331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587d66e1-3e2b-4ff9-aa45-ca2cad980e44/how_to_reference_apa_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc61d7bd-b574-48dd-b66a-6205661ce772/how_old_mason_mount.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49cb6f2d-f314-40fd-941e-7703d502fbc4/rain_bird_sst900in_installation.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_off0000e548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 5308 bytes
SHA-256: 93f67db3b1b2d7791bac7c735c901edd52b5d648c44f10fc30e1d49c57cb4895
font_01_sfnt_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 10392 bytes
SHA-256: 6f36f28521e36229efe2bad4c974b961e797f3a79f75b59ec5aa214b2ee41be3

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