Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae42027cdd2ef60…

MALICIOUS

PDF

87.2 KB Created: 2021-05-17 13:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: feba47a878242f2babfb48db693026e6 SHA-1: 5ca5852f5284d68350982da317219da4db2af364 SHA-256: 3ae42027cdd2ef603ce6f4113f4b1ed571bb146ea041d23163b9745724c57038
126 Risk Score

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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=kenmore+gas+range+790+specifications PDF link annotation
    • https://lesikikonojen.weebly.com/uploads/1/3/0/7/130740189/3881315.pdfIn PDF document text
    • http://new-leggins.site/kilebiduwezakezilapotaw0sbfa.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/83083331867.pdfIn PDF document text
    • http://damvglaz2.xyz/wuraxonug53le.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/20824583821.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/hannah_arendt_trke.pdfIn PDF document text
    • https://livorenofog.weebly.com/uploads/1/3/1/1/131163774/puruvubifaru_zoxuxigazozuwe_dupesifukewewem_mutadurufab.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/golejerelelu-lebimajases.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/joserabiranixikoritux.pdfIn PDF document text
    • http://questotzvezd.space/zaguwomo4kcax.pdfIn PDF document text
    • http://kalukoroduro.mygamesonline.org/ancient_greece_timeline_worksheet.pdfIn PDF document text
    • http://vinorama.fun/15091127173hjej8.pdfIn PDF document text
    • https://zudalutotazif.weebly.com/uploads/1/3/1/3/131379026/moniz-mamenopubub-gufafolovox-fezox.pdfIn PDF document text
    • https://vipamabukaxeban.weebly.com/uploads/1/3/0/8/130874648/c234cd9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/623930ed-b7f7-4ab0-9f34-8aa111017109/asus_xonar_dx_pci-express_x1_7.1_channel_sound_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8d5448-5cc9-408d-8678-2bbff7aec4cc/pocket_emergency_medicine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd657f8-b2dc-41e6-95a1-063202543617/29339329618.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/how_to_use_onenote_to_stay_organized.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/856b24b1-5bfe-4b45-a254-d448ee7e88d5/14298033612.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/86233741304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eab6637-9ee2-4ce5-81cd-08801d0e0091/quantum_mechanics_for_dummies_podcast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfb2830-0b39-4ab7-bd68-6ccd47fa1519/xawidufunadovesoturapexi.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/76419639089.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/sironoforodexomusabejel.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_off000113c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C3 5648 bytes
SHA-256: 1b4c6982b5c6da3b77f5e00396a82b71f3ba07e5b35e5d1599a5706e6f493d78
font_01_sfnt_off000126ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EF 12088 bytes
SHA-256: e153652450b184fd7822b7f76b8b07fc06f24aa0a6ee19f7ed2d43c060be82c1