Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ad4915d81dea3c…

MALICIOUS

PDF

78.7 KB Created: 2021-03-09 18:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6a37199b8cb0c15184af92973e9ef4fc SHA-1: 97710ddd314dba13495c8eff9a349137f09dd27b SHA-256: e5ad4915d81dea3cab2f416e701e78837caf6fa31897cdfceb4fe8cda5673d64
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document's structure and embedded links suggest it's part of a campaign to drive users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=chocolate+war+movie+online PDF link annotation
    • http://soldonlittleton.com/kavuvir1arw1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_60372ef2163ea.pdfIn PDF document text
    • http://bestsaleshopin.xyz/10730002786v9fi4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5fda634bbbd02.pdfIn PDF document text
    • http://armlur.space/51758052412ema0r.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/avent_bottle_sterilizer_instructions_how_much_water.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449998/normal_601841ca53ed2.pdfIn PDF document text
    • https://cdn.sqhk.co/mogujawogo/gejjScm/jozurexaveb.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/junidefrpl2z.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/5jehcgc/spinach_artichoke_dip_mellow_mushroom_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/cidfhd1/xikelewakafibuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451760/normal_601dff97e1160.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465133/normal_5fc737641f235.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/nhc1ggs/madawegetifupifesasejer.pdfIn PDF document text
    • http://obuv-kozha.ru/insert_copied_cells_google_sheets9bpsg.pdfIn PDF document text
    • http://lipazegeboludep.sportsontheweb.net/90329915050.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/bjglL3c/satol.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/2dc6a63b-9085-4cc0-aead-eaef11ca6941/the_outsiders_worksheet_answer_key.pdfIn PDF document text
    • http://futakanawus.onlinewebshop.net/davuluwuta.pdfIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_26f685f9c024466fb6d484088dbd722d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d55fbf9-1071-4d46-8fd7-ef4690fab169/the_one_thing_gary_keller_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4beeb2dd-76cd-4b7d-a91e-47114ebb13fd/girakasumiguliwekivafexu.pdfIn PDF document text
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_98ac1c9a8626450790eece5594ce61b8.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_96ebb6bda0714bd392a0ea978716ec20.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_off0000f582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF582 4916 bytes
SHA-256: 352b30e4f909d8dd727cc8558a894e268bff12d1fcb74670ab10e0762981963c
font_01_sfnt_off00010624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10624 11396 bytes
SHA-256: 02e923e8bb6c97b730231f175b28897899f1b16e5e4afbc2ef0f8304d6960241

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