Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7532cb4399f685…

MALICIOUS

PDF

81.9 KB Created: 2021-03-08 21:11:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6a28570728fe8b48a096a130c526faef SHA-1: 9840dc4d8ede23ee34a2cb17d6b4ee5e700c4339 SHA-256: 9c7532cb4399f685c9902eaf7ae35f9174ac9543824de199093c3b17bac45d7e
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://golowaki.ru/123?utm_term=mastering+biology+chapter+21+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383574/normal_603148b22ca90.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/whirlpool_cabrio_dryer_troubleshooting_af_code.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/94770301730.pdfIn PDF document text
    • http://gevenukodujojov.getenjoyment.net/safevemejotunedasikebaba.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/45176e602.pdfIn PDF document text
    • https://gakikodokuni.weebly.com/uploads/1/3/1/8/131857060/xokitapurini.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/103e52a7783.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/zodonez.pdfIn PDF document text
    • https://gebejisidimi.weebly.com/uploads/1/3/5/3/135302949/ripijefekap-guzerogufad.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/rebecca_daphne_du_maurier_first_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_5fe955c9bf37a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadoxosin.atwebpages.com/vunubisuguzoleziviwimi.pdfIn PDF document text
    • http://femomebokubogom.epizy.com/axcrypt_1._x.pdfIn PDF document text
    • http://wijarixeva.rf.gd/letra_y_explicacion_del_himno_nacional_de_honduras.pdfIn PDF document text
    • http://dudulexo.epizy.com/verizon_fios_tv_app_apk.pdfIn PDF document text
    • http://zijedan.atwebpages.com/74653860125.pdfIn PDF document text
    • http://rolaxaja.rf.gd/video_format_for_car_cd_player.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/stress_management_tips_for_college_students.pdfIn PDF document text
    • http://surafupomef.epizy.com/lopi_answer_wood_stove_blower.pdfIn PDF document text
    • http://zaxigadanu.rf.gd/airtable_manual.pdfIn PDF document text
    • http://pikezega.epizy.com/177_mental_toughness_secrets_of_the_world_class_barnes_and_noble.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000eedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDB 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000ffc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 5716 bytes
SHA-256: cb7f0c51b509adb9a2b5e680446be5443222350bb5047fffcfb0d7621dd382df
font_02_sfnt_off0001135e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135E 10756 bytes
SHA-256: b710781a7c478233b0c9e60ca0eff689e77ed10487784e10f88b1dfaf8c318f5

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