Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4110d0249e319fe…

MALICIOUS

PDF

109.4 KB Created: 2021-05-01 02:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7391ae7cf41d8d8e8a26dcad35122602 SHA-1: 489ee74cd9ea14fe12d5595e2ed188949f8225f4 SHA-256: c4110d0249e319fe0ba77dfb6ba7ad93d60e52398d5abf0363a2b2cc565767f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many of which point to suspicious domains and are likely part of a link farm designed to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM firing suggest the document's primary purpose is to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

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://jumiwimov.ru/strik?utm_term=adobe+premiere+pro+cs6+tutorial+text+effects PDF link annotation
    • http://eglo.club/taduduxovetugesatodifemua4nup.pdfIn PDF document text
    • http://topcreditreport.info/26545949095cuifd.pdfIn PDF document text
    • https://dovowufola.weebly.com/uploads/1/3/4/4/134438787/mulunufe.pdfIn PDF document text
    • http://leafester.online/electrical_engineering_ebookszaxwx.pdfIn PDF document text
    • http://love-your-lips.online/74887468172xxfo5.pdfIn PDF document text
    • http://50offstore.info/jevefimomanxq2ht.pdfIn PDF document text
    • https://bavobero.weebly.com/uploads/1/3/4/5/134585538/274033.pdfIn PDF document text
    • http://load-bcp.com/are_water_parks_open_in_wildwood_njshufl.pdfIn PDF document text
    • http://easterthjg.com/wahl_cordless_trimmer_set4n77x.pdfIn PDF document text
    • https://kavivafome.weebly.com/uploads/1/3/2/7/132740637/258291.pdfIn PDF document text
    • http://mivetys.xyz/cuanto_mide_un_metrop8tx1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vigevot/corona_kerosene_heater_wick_22-dk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca04125-70ef-408b-bd65-7b70252cefed/1998_toyota_camry_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/fanepezasorexadepupomowut.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/46457375759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/017628f8-8748-43dc-b28e-d1670c9c485a/57438026396.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/timelitiwamusid.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/bma_recommended_fees_for_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc7ac7a-40ce-47b1-a5fe-aa539b77a1f2/what_is_cybersecurity_awareness_month.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/bluejackets_manual_first_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/46663160788.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_off00016b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B93 5652 bytes
SHA-256: 072bf655575248f4d863bf8b9c29c92444f58876d2a23476997292d7c5436a95
font_01_sfnt_off00017eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EB6 11404 bytes
SHA-256: d4838eba9a724629ba6fb25add25b3e892d09f64303604025c0f7165fde48517

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