Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14c3f236e16454a…

MALICIOUS

PDF

91.8 KB Created: 2021-01-25 12:28:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8a492f8585a89aeae265da2dd656e87b SHA-1: 49387cd872b7752df136ecd9aa9ef376b6ee39e2 SHA-256: c14c3f236e16454a49c90c98f8c6242f113da11d9e3771727ba372d8aa347497
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external URIs, with one notable example being a redirector URL. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is designed as a link farm on disposable hosting, likely to distribute malicious content or phish for credentials.

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://leonvi.ru/123?utm_term=tarahumara+running+leadville+100 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415756/normal_5fe75c32567ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5fd2364d6d632.pdfIn PDF document text
    • https://turugoduzo.weebly.com/uploads/1/3/0/7/130739986/8d46c36da15846.pdfIn PDF document text
    • http://buviturowugigew.66ghz.com/xexoragimusufifomezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478928/normal_5fe752e111208.pdfIn PDF document text
    • https://lanekuloriko.weebly.com/uploads/1/3/0/8/130874063/xakelajimukom.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/7499431.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/minnie_mouse_banner_template_printable.pdfIn PDF document text
    • https://ruliduwaj.weebly.com/uploads/1/3/4/0/134016670/8badc37229c07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5ff1d4da3749d.pdfIn PDF document text
    • http://lefenup.22web.org/pretend_cnco_song_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://relumewamamit.rf.gd/kelepedobokudota.pdfIn PDF document text
    • http://pojasiw.rf.gd/binary_agrobacterium_vectors_for_plant_transformation.pdfIn PDF document text
    • http://babupit.epizy.com/bullying_informacion_en_ingles_y_espaol.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/delhi_metro_navigator_app_free.pdfIn PDF document text
    • http://vatimofaxemog.rf.gd/79602285001.pdfIn PDF document text
    • http://tosopipates.epizy.com/zebafirifaviwawadi.pdfIn PDF document text
    • http://noxikemudenuma.epizy.com/angulos_y_rectas_1o_eso.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2F 5264 bytes
SHA-256: aaa9f6a933d0bed27ddd13ad4942e676c01dcc9ff75448550ede68d6abc1e802
font_01_sfnt_off00012fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEF 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00013b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B52 11164 bytes
SHA-256: 3aef921a7bf6ce3c58e70c599fa69b43a30097ea1e9843c855afeca4b4a61074

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