Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e33d522165b5bd2…

MALICIOUS

PDF

81.9 KB Created: 2021-03-07 12:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9407be85bad0fe95e3e13f1e1adccb24 SHA-1: 7a7a83470248f66f11c087c76ae447c9808ee5a4 SHA-256: 2e33d522165b5bd2726643aea9fe6354bcc8345a50cbedf6823d36b8672ca6bb
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized domains designed to host malicious content. Heuristics indicate a link farm and a redirector, suggesting the primary purpose is to funnel users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/wix?keyword=luke+chapter+12 PDF link annotation
    • http://citruss.space/rawoms0sv9.pdfIn PDF document text
    • https://sulovuve.weebly.com/uploads/1/3/5/9/135973568/5068674.pdfIn PDF document text
    • http://bionatur.space/octopus_watch_alternativeav82v.pdfIn PDF document text
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/satex.pdfIn PDF document text
    • http://complect-tech.ru/koxusizenuguwizao5mml.pdfIn PDF document text
    • https://nekazexupogufeg.weebly.com/uploads/1/3/1/4/131454238/dudixet.pdfIn PDF document text
    • http://iuts.space/acer_aspire_1_specs_2020o1of6.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/46052514546.pdfIn PDF document text
    • http://nubatevujonuw.mygamesonline.org/dolavonidinixuze.pdfIn PDF document text
    • http://paxabak.mypressonline.com/36105360805.pdfIn PDF document text
    • https://dirututusobed.weebly.com/uploads/1/3/5/3/135347210/8924933.pdfIn PDF document text
    • http://rameautbxy.space/nivoxero6z3sp.pdfIn PDF document text
    • http://auto-fishing-rods1.club/ielts_6_reading_test_2_answersuz743.pdfIn PDF document text
    • http://dopogabijup.mywebcommunity.org/moropu.pdfIn PDF document text
    • http://chambrehq.xyz/tuken2xjq1.pdfIn PDF document text
    • https://todoxaladavefuk.weebly.com/uploads/1/3/4/5/134529573/kuxomenokuku_gubodorazi_kisanarimu_xafilojifirop.pdfIn PDF document text
    • http://topstudy.fun/258342571495f364.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/gogunabones/blast_furnace_guide_steel.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/xolezosenunipusaboj.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/bengal_tiger_movie_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/archero_hack_gems_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/variable_valve_timing_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/grammar_checker_free_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/acls_therapeutic_hypothermia_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/comma_splice_errors_worksheet.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/bible_books_in_chronological_order_of_events.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_off000103a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A5 5000 bytes
SHA-256: 3f089ff975882a78ef54569a4561bc34ad7387d91c8b5247470bdad48440b173
font_01_sfnt_off000114ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AE 11604 bytes
SHA-256: 29a0dcff5472bb4ee628ba1d145a74ab6ffcf0e968d4f11f92a6d7789f4cde34

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