Malicious PDF — malware analysis report

Static analysis result for SHA-256 cede5d79feaefd3f…

MALICIOUS

PDF

75.4 KB Created: 2021-04-08 06:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8882a104f375d78125f75d182fc1b878 SHA-1: c329bec8f12d876d1c0049f7bc28d53dfdf686d3 SHA-256: cede5d79feaefd3f099386b04b64936cdd4aae822f9e52d53836bc22db5baafa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://resalured.ru/strik?utm_term=can+being+gluten+free+be+harmful PDF link annotation
    • http://eglo.club/what_is_baron_de_montesquieu_famous_fordqk1l.pdfIn PDF document text
    • https://xepekozodixati.weebly.com/uploads/1/3/5/3/135346226/tokor.pdfIn PDF document text
    • http://topchambre.xyz/marshall_mg100fx_full_stacka94ui.pdfIn PDF document text
    • http://matrixbicycles.com/antigona_sofoclesemuwz.pdfIn PDF document text
    • http://tegor.xyz/lee_patrick_strobel_booksxonwy.pdfIn PDF document text
    • http://boevoenlp.com/72406903287paiwa.pdfIn PDF document text
    • http://wapajag.22web.org/karl_marx_capital_chapter_1_summary.pdfIn PDF document text
    • http://tesocoin.online/download_overkill_3_mod_apk_revdl8x90k.pdfIn PDF document text
    • http://jopkapopka.online/tedizozegekabumekenamikeevhi5.pdfIn PDF document text
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/14ab2.pdfIn PDF document text
    • http://pububasolemi.22web.org/13878693275.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://uploads.strikinglycdn.com/files/9c010d3f-e53d-4416-94cb-cdfd5f9bfe79/7899420738.pdfIn PDF document text
    • http://kugibujupedo.rf.gd/6051434665.pdfIn PDF document text
    • http://fonenutekosut.epizy.com/rikuzugokinevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10bfec1-b91f-415f-9fdf-7d931ffb544c/cub_scout_webelos_meeting_plans.pdfIn PDF document text
    • http://rifezovepon.rf.gd/muropaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ec8f28-93dc-4d87-b648-f7db9718560a/tenika.pdfIn PDF document text
    • http://vejesigivilowen.rf.gd/report_power_out_duke_energy.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_off0000dda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA6 4940 bytes
SHA-256: 1372969f604d79cacd1948bde4847c1fec19ecc8ff5b78ac68e430771ed4700f
font_01_sfnt_off0000ee4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4A 10540 bytes
SHA-256: d93bd4adb00446b705428187ee4cab9bb08078c0689f35a6f9806f38cfa557ad
font_02_sfnt_off00011257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11257 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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