Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cfbd56389c2377…

MALICIOUS

PDF

68.4 KB Created: 2021-02-23 03:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d5bb22cd24167e9bed9d7e34065e5a66 SHA-1: 9ac8c99e5d00c9b37db68c92f034bed6d6b2c58e SHA-256: 93cfbd56389c2377753951b742f0114df57fbb6f92ed9ff59274fddcd3540c2a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of an attempt to redirect the user to malicious sites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/aws?utm_term=moultrie+m880+game+camera+instructions PDF link annotation
    • http://firolinulaka.22web.org/forgotten_realms_books_for_sale.pdfIn PDF document text
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/ab9777da71806b.pdfIn PDF document text
    • http://nojosomefoviw.66ghz.com/ccna_2_exam_answers_2017.pdfIn PDF document text
    • http://kkkirrreeee.space/little_dipper_crock_pot_instructionsmhv8i.pdfIn PDF document text
    • https://joposiga.weebly.com/uploads/1/3/5/3/135399072/midiwinexogu.pdfIn PDF document text
    • https://rufogeror.weebly.com/uploads/1/3/4/6/134664275/nuwuxato-puroporejewadi-vuruw-jeranatigerubun.pdfIn PDF document text
    • http://present-mag.ru/tijekoloo27ru.pdfIn PDF document text
    • https://tizirawosow.weebly.com/uploads/1/3/1/4/131483061/moxutosodejiza_nerupub.pdfIn PDF document text
    • http://optamorem.com/cisco_7941_firmware_update1k0hc.pdfIn PDF document text
    • https://jomibijavajele.weebly.com/uploads/1/3/1/4/131409275/fenewawotozaxu.pdfIn PDF document text
    • https://nerupeke.weebly.com/uploads/1/3/1/4/131483009/vetiximuluxo_tukurofekok.pdfIn PDF document text
    • http://ceter.xyz/singer_fashion_mate_7256_bobbin_threadingif70a.pdfIn PDF document text
    • https://kofovozeregom.weebly.com/uploads/1/3/4/3/134313602/2273010.pdfIn PDF document text
    • https://buparemekixa.weebly.com/uploads/1/3/0/7/130739227/tipiritupabokof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tubafurubeg.epizy.com/kozesapimofu.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/60090809509.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/zuwasuvatujimoxap.pdfIn PDF document text
    • http://fosadexovoz.epizy.com/8_point_compass_worksheet_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/mifonilaberubolose.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/hacker_wifi_wpa2_psk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/bleach_vs_naruto_3._3_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/psat_practice_test_2_answer_sheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8E 5460 bytes
SHA-256: 005705c9a51ad85934f837d692b40111eedaa0b4c046bc495535972c46f3caf5
font_01_sfnt_off0000df0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0F 10356 bytes
SHA-256: 549a6327415efd4e318468a77551707ddd1c50be56339f5488482336d1fa4316

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