Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d728370ffa10ff…

MALICIOUS

PDF

78.1 KB Created: 2021-03-09 17:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 54083e0e34c46db3d8ef870c5f4aa4ab SHA-1: 1a0150f2628dbfbb60cbf0c16cbe6154f0528b61 SHA-256: e5d728370ffa10ffdb82ed9a610aa9c78dabdc670bbab2d557208d5aa85eb3e5
186 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 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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=christian+baby+boy+names+list+pdf PDF link annotation
    • http://topstop.site/rabojusejaxelileq5oy.pdfIn PDF document text
    • https://zujituxo.weebly.com/uploads/1/3/2/6/132681889/kesugimaboluzugafer.pdfIn PDF document text
    • http://jenirafona.22web.org/alfa_romeo_giulia_2017_owners_manual.pdfIn PDF document text
    • http://wurogutevifo.iblogger.org/the_walking_dead_vol._27_the_whisperer_war.pdfIn PDF document text
    • http://nufemewi.iblogger.org/how_to_connect_soundbar_to_samsung_tv_using_bluetooth.pdfIn PDF document text
    • http://natiral.space/xizolu3rgjz.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/deporekuf_numap.pdfIn PDF document text
    • https://zememaxuzibur.weebly.com/uploads/1/3/5/3/135326459/05bd0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e9d94511-0d76-4b6b-b98f-10f6c7184b35/daviremofozokul.pdfIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_76b42554006e46c09f0a7718c7d747e0.pdf?index=trueIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_18bf4efd9e7a4c3bb2a6c2d1bffbd6a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd58632e-52ec-4cc5-8313-ad15eea0cc50/how_to_clean_a_p95_ruger_9mm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d52495a3-e127-41aa-9b7f-cddf995e30b4/xumub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e2e5f24-e268-40ea-8ae8-356e0904be89/81734459831.pdfIn PDF document text
    • https://4a31e3f8-49e3-4331-b1a9-c0bb7a6b9dbc.filesusr.com/ugd/599f1c_ad8e00f342674ef3b0c5fa87f0fa7dd0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4527767c-470e-4df9-9e6e-ec0ea5ebfe4b/sena_20s_evo_universal_pairing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/078c8b5b-5b75-4cc5-95f1-f15c6de0c990/surah_mulk_daily_what_does_this_protect_you_from.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE762 5332 bytes
SHA-256: 08a81c295e50f6aad85a2cbcae9f91d51eaad85eaafe6ceae2505e0e70940b1a
font_01_sfnt_off0000f951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF951 10412 bytes
SHA-256: 8727181075617d3281a153e55aa96914774e7e06b8e5c8397ebb03ef5a894bf3
font_02_sfnt_off00011d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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