Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe161a55b87289bd…

MALICIOUS

PDF

79.7 KB Created: 2021-03-23 22:00:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a56b6e4a753203fb0d60cd886e549963 SHA-1: ccc4196b1fbe3d48a7d71b4ecdb30517ecad28f3 SHA-256: fe161a55b87289bd326cf180929b892ebe23b363992d50b015f54b1d36ae71b0
252 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting or known malicious redirectors. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent, likely to direct users to phishing sites or download further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/123?utm_term=baixar+pdf+apk+para+pc In PDF document text
    • http://prizyivnik.ru/how_to_set_time_on_casio_watch_with_four_buttonsb29lz.pdfIn PDF document text
    • https://wigeludob.weebly.com/uploads/1/3/1/6/131636858/2871571.pdfIn PDF document text
    • https://lobekopaxukibo.weebly.com/uploads/1/3/1/4/131453735/gubalidomiken.pdfIn PDF document text
    • https://filofasifujutoz.weebly.com/uploads/1/3/0/8/130874575/9742704.pdfIn PDF document text
    • https://vebupixe.weebly.com/uploads/1/3/4/8/134854050/46653db826b9.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/75167330970tmvtt.pdfIn PDF document text
    • https://ximesadi.weebly.com/uploads/1/3/0/9/130969353/votuwagabid_rovexasomofipu_juzika.pdfIn PDF document text
    • http://kevikakagax.iblogger.org/34807653842.pdfIn PDF document text
    • https://vavuxajibibugu.weebly.com/uploads/1/3/4/4/134472661/nujaxa.pdfIn PDF document text
    • https://burusezal.weebly.com/uploads/1/3/5/3/135306482/9434819.pdfIn PDF document text
    • http://keepsufi.space/mevilowipuwaraf7erm9.pdfIn PDF document text
    • http://copyrightnotice-ig.com/rasarakotaaz3cd.pdfIn PDF document text
    • http://motivawka.online/famijubatadevurhvaf.pdfIn PDF document text
    • http://voxamuzovo.22web.org/interstellar_stay_piano_sheet_music.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/dujepav/tamasha_movie_songs_djmaza.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/82212265463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430bdc10-b752-4f4d-b90e-da8798c2b674/gogowina.pdfIn PDF document text
    • http://sapumazolexu.epizy.com/jubuduvule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987d5c06-dbf6-4e7f-a7a1-784d16a8a2d5/bigezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca16926-06c8-4e66-a749-9edd10990620/living_on_a_dollar_a_day_lesson.pdfIn PDF document text
    • http://lebasasasob.epizy.com/guide_touristique_core_du_sud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fcee26-7488-45f9-848d-4f06f3fbe403/resawarigobusin.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_off0000ed4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 4496 bytes
SHA-256: 652846a3c36a86bc78d175f886e5f2e31a6c84b0d1b21e932909c8689d6ba63b
font_01_sfnt_off0000fc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9D 12812 bytes
SHA-256: 9bc236d25b0af756d9aedeaea764772bb0f766847fc06d94296e772828bba044
font_02_sfnt_off00012376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12376 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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