Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcdccd396007172…

MALICIOUS

PDF

80.1 KB Created: 2021-02-28 00:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1c3f58fe42c1069dea986846db16cb28 SHA-1: feca3e73f168a5f2e6bb016a8d6dfa6c091fd3e0 SHA-256: ffcdccd396007172086ef94db380cfa752a7f37cb7af35b38408b1b95c9a9be2
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 0.9996

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=how+to+make+your+own+organic+chicken+feed PDF link annotation
    • http://xokesate.22web.org/kowanulib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476122/normal_6029227894100.pdfIn PDF document text
    • http://top-shop-store.website/9855569744738aks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452154/normal_603955f520980.pdfIn PDF document text
    • http://xafegadixugu.iblogger.org/18806943852.pdfIn PDF document text
    • http://topsale.pro/ronavizuzafoduzemegaw10na.pdfIn PDF document text
    • http://chatik85939775.fun/zevakitizijononuzibugalijonulg.pdfIn PDF document text
    • http://filanion.online/adoration_du_saint_sacrementbik4o.pdfIn PDF document text
    • http://kawolamekepe.22web.org/33968499305.pdfIn PDF document text
    • http://priz24.site/siwuxesek53uq9.pdfIn PDF document text
    • http://fenellalucynelle.info/555633347492mfmn.pdfIn PDF document text
    • http://josebixotarez.22web.org/muxatagatanaresase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401716/normal_600a3b5e2d00e.pdfIn PDF document text
    • https://linezajokopu.weebly.com/uploads/1/3/4/6/134629872/842117.pdfIn PDF document text
    • http://dalnoboyi.xyz/arap_sabun_formlpc5co.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427103/normal_6005467ad2325.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
    • http://forubav.rf.gd/venixupadul.pdfIn PDF document text
    • http://xegunapajom.epizy.com/chaar_sahibzaade_movie_hd_free.pdfIn PDF document text
    • http://tojulov.epizy.com/nedetut.pdfIn PDF document text
    • http://digegaleviverab.rf.gd/free_emulator_for_android_app_testing.pdfIn PDF document text
    • http://vemaxuvigufu.epizy.com/how_to_mix_and_master_fl_studio_20.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_off0000ebc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC7 5328 bytes
SHA-256: c460386db5ce14fbce57f6e2ac8f5fa18367275db36c6eb125f3c7135bc777d5
font_01_sfnt_off0000fdc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC9 11028 bytes
SHA-256: fc57f69277c965b10111ae40dbc67d736f8f5220f84ea6e1f6cfccbcf7e790d0
font_02_sfnt_off0001231b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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