Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5be5f11056ce181…

MALICIOUS

PDF

79.2 KB Created: 2021-05-20 10:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 18e9a02ad33916b5ed7f355934f67671 SHA-1: a192a2470f599f86e63e0b5d78326714df476546 SHA-256: c5be5f11056ce18162d2d4fb2e9d3a548f6237abd4e37babc338a50fdc3b7c3f
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to benign-looking PDF files, but one prominent link leads to a suspicious URL that mimics a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to further malicious content. No scripts were extracted, but the PDF structure itself is used to host and present these links.

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 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://kuzutuzo.ru/strik?utm_term=how+do+i+connect+my+onn+bluetooth+headphones PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482002/normal_5fcad6a24df4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449992/normal_5ff1523136c7d.pdfIn PDF document text
    • https://benefirezunaxo.weebly.com/uploads/1/3/4/8/134864331/wejexesezugav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378845/normal_5fca4cc6d46c1.pdfIn PDF document text
    • https://dakurawal.weebly.com/uploads/1/3/5/3/135321076/04909.pdfIn PDF document text
    • https://fetedujas.weebly.com/uploads/1/3/0/7/130776810/lopepiladegirokamase.pdfIn PDF document text
    • https://rutukosawokiw.weebly.com/uploads/1/3/4/3/134318214/876876a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lebaxa/lozizig.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/71964689641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71eeb25d-a8fa-4e8f-ac96-aad490f7e05d/41014522019.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/nuzikebinikotedenajilo.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/35162408515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d35ab85d-a53a-4764-a113-d3a23fe95943/best_oil_for_jeep_grand_cherokee_diesel.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/spider_solitaire_offline_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/vubul.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/surf_report_capbreton_vvf.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/dejoxujatajanud.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/how_to_make_forms_in_word_fillable.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/39385887605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046dd3c4-9f82-41f2-9762-f1093fdd388e/kawinumuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F9 5396 bytes
SHA-256: 01eded2f22c1cf1334e4cfa595f2d014f559cdc62c618ded094b5e0229c81e8b
font_01_sfnt_off0000fc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 10980 bytes
SHA-256: cf5876de3262e9ae5260d69a678d5e6d06d182907aa2032a47de439a73b05201
font_02_sfnt_off00012177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12177 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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