Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae773a740ae90b5b…

MALICIOUS

PDF

75.0 KB Created: 2021-05-03 10:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 66e64d3be1f1fef42a1047895e03cdf3 SHA-1: 59ae887b2d9c5dd3b274fda16d4d3c77557b1d56 SHA-256: ae773a740ae90b5bab31f867cfb46346a6e201c3274f303257c80e53bff409dc
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://mezovuduw.ru/strik?utm_term=a+clash+of+kings+audiobook+roy+dotrice+free PDF link annotation
    • http://tigafik.mygamesonline.org/what_does_loki_mean_in_slang.pdfIn PDF document text
    • http://mikapamaku.22web.org/bollywood_movies_2017_songs_free.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/desiwonewu.pdfIn PDF document text
    • https://foxakiletomuxo.weebly.com/uploads/1/3/4/0/134012751/fokila.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/71568056486.pdfIn PDF document text
    • http://davofaso.22web.org/balada_de_amor_ao_vento_baixar.pdfIn PDF document text
    • https://xevupuwikuguv.weebly.com/uploads/1/3/0/8/130814145/c332f306f7e.pdfIn PDF document text
    • http://rerulekoba.66ghz.com/ukulele_tabs_download.pdfIn PDF document text
    • http://nawogevimogagu.22web.org/33841540444.pdfIn PDF document text
    • https://sapefita.weebly.com/uploads/1/3/0/7/130776655/9113666.pdfIn PDF document text
    • http://fidesuwuranotif.getenjoyment.net/curriculum_vitae_sample_download.pdfIn PDF document text
    • https://purapunebofo.weebly.com/uploads/1/3/4/8/134888030/nebakowimimajadud.pdfIn PDF document text
    • http://zibinonoja.22web.org/adobe_acrobat_reader_for_windows_10_free_download.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/bff79371-7e60-4fac-8d40-6bc1942c70da/safomisirelifevuxakem.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/20727191373.pdfIn PDF document text
    • http://verizukavorili.rf.gd/tonuvaxonerokuvivugo.pdfIn PDF document text
    • http://soregoboredu.rf.gd/bosevuwip.pdfIn PDF document text
    • http://jizemefuzix.epizy.com/free_carfax_report_dealership.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867876cf-2349-4ff2-9eba-2408a2f8b124/50_shades_freed_free_online_dailymotion.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/74407704382.pdfIn PDF document text
    • http://jomopizemiz.onlinewebshop.net/radufutawef.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61D 5580 bytes
SHA-256: 2352bac335279acca00f8fd346d067b66e5cf9b638b752363abfda812996fa50
font_01_sfnt_off0000f91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91A 11208 bytes
SHA-256: 52512c921a93be84e56c2391f360b20f0a106a9835c677fa77fe7ade45cd9838

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