Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a07eb8eca1fbae…

MALICIOUS

PDF

77.3 KB Created: 2021-03-23 15:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a1ad364d87cf7dbec6b6cf8607a950f SHA-1: ab968a251be076af4a2c33b328ba7c36d8ee9438 SHA-256: c7a07eb8eca1fbae34a7286f0a4fb55d58926f88e3c0a91fa177f9db64e7eec3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that redirects to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to educational services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=best+english+language+course+in+singapore
    • http://vebenuzan.22web.org/bootstrap_sass_tutorial.pdf
    • https://vesanalu.weebly.com/uploads/1/3/1/4/131482823/jafaxenawuf_dabub_rajefazavoba_xopaf.pdf
    • https://baduzewikabure.weebly.com/uploads/1/3/4/3/134317938/jojakijewusekokuvu.pdf
    • http://cheapkeys.site/plan_de_exportacion_de_tequilathkuu.pdf
    • https://dusonibegoxat.weebly.com/uploads/1/3/1/3/131380688/bamib-mexinegu-takaxemarazun.pdf
    • http://igbusinessabouthelp.com/hs_mini_maxx_tuner_update4xfh0.pdf
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/37649183f.pdf
    • http://dipazekonowa.mypressonline.com/bloodlines_2_richelle_mead.pdf
    • https://buzoraxuv.weebly.com/uploads/1/3/4/3/134366179/7151338.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tisevor.rf.gd/best_antivirus_software_for_android_phones.pdf
    • http://pirefalanife.epizy.com/awareness_of_cervical_cancer.pdf
    • http://ripijinev.rf.gd/app_for_more_followers_on_instagram.pdf
    • http://vobozezojip.onlinewebshop.net/organic_nomenclature_practice_problems_with_answers.pdf
    • http://nefaped.epizy.com/sofajuxene.pdf
    • http://wozitoso.atwebpages.com/bonjour_tristesse_francoise_sagan_download.pdf
    • https://s3.amazonaws.com/toliwudalamem/gesitadelipamig.pdf
    • http://dovijurosovixen.rf.gd/71678163836.pdf
    • http://kijenor.epizy.com/57222529435.pdf
    • http://wajalapivibobi.epizy.com/wiwij.pdf
    • https://s3.amazonaws.com/memobofilenabon/82275446954.pdf
    • https://s3.amazonaws.com/teximikamukubo/netbeans_with_jdk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef24.bin
cc031ac1d142b043ea52672432c366815f7799bbaf07222c3ed9b5b76cf3173f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF24 5244 bytes
font_01_sfnt_off000100fa.bin
6e56cb98c611601bc5033b1f38818df8ac7f85efbb1ed44e3a683ba2715c1cd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x100FA 11424 bytes