Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01115c4d562ae07…

MALICIOUS

PDF

76.7 KB Created: 2021-04-08 17:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e34254eeceb905865c0350fe724bfe3d SHA-1: 57c82f548ebe7fef57ca8ae847adec50d4d8669f SHA-256: e01115c4d562ae072521d06c8c73ff0d7650bd0bd519d00a198edd0d88f64d55
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://botokaw.ru/strik?utm_term=fan+light+flashing+on+broan+range+hood PDF link annotation
    • http://feldhaus-klinker-plitka.ru/onkyo_tx_sr608_no_soundzax5t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419630/normal_606065f2afbb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_6059f4a471b6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418556/normal_5ff5d3857020c.pdfIn PDF document text
    • http://avtovishki-msk.ru/ejercicios_de_contabilidad_resueltos_2_bachilleratoqd26n.pdfIn PDF document text
    • https://pukokisawar.weebly.com/uploads/1/3/4/7/134749025/0b0cd.pdfIn PDF document text
    • http://lnstagramoriginal.com/22544899862ma0q6.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/8795991.pdfIn PDF document text
    • https://gufekibeliwu.weebly.com/uploads/1/3/1/3/131382841/1003301.pdfIn PDF document text
    • http://takavejesutep.iblogger.org/vijaleradepolubekefose.pdfIn PDF document text
    • http://rfs.team/dark_forest_cake_imageslfc6s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421056/normal_6055b99a2c01f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421207/normal_60645b1e81f62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485698/normal_604604e7bf92d.pdfIn PDF document text
    • http://dukovasupufe.iblogger.org/citation_index.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://vajowevub.epizy.com/mebonovewigaretapam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d440a8c2-225a-4eef-8a90-24e7dcd6b293/31575023494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22445359-57c4-47e6-a4c2-0528528bd828/how_do_i_connect_my_hp_deskjet_2545_printer_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46c7167-c464-4ef1-9202-e0ae0bc61799/why_wont_my_apple_tv_remote_work.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_off0000e154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE154 5052 bytes
SHA-256: 96c143a7407210d9889d07f43b760b7ba583048053467a1aa607bd5929c1ceda
font_01_sfnt_off0000f270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF270 10616 bytes
SHA-256: a56af17b96cb80895e065e32b3c392b2efc7c2645e20bd49ba9c27800e974c08
font_02_sfnt_off000116c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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