Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea800d241c330b32…

MALICIOUS

PDF

80.4 KB Created: 2021-04-07 09:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 30f083e478a3529041162992a5c897dc SHA-1: c31c4d03f8e23be9a858afb14a2264ea1ccb57dc SHA-256: ea800d241c330b32e46e47603f8df73010c68735890fe73041ad5f3a559e4f4d
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://botokaw.ru/strik?utm_term=can+i+use+my+swiffer+wetjet+on+hardwood+floors PDF link annotation
    • https://cdn.sqhk.co/wobuwozavenu/a7jjhbd/buxadixemoporozififet.pdfIn PDF document text
    • https://cdn.sqhk.co/safovokon/XSigmrW/pepagixi.pdfIn PDF document text
    • http://probmaka.tech/24234860324drwyd.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/41401735382.pdfIn PDF document text
    • http://antinomi.design/wahl_clipper_corp_stock_priceoyqg8.pdfIn PDF document text
    • http://mkr-olimp.info/what_is_the_tax_exemption_for_2020gducl.pdfIn PDF document text
    • https://cdn.sqhk.co/ronizimat/fSiehdA/73785554576.pdfIn PDF document text
    • http://gepavozo.mygamesonline.org/sixewolitubeketize.pdfIn PDF document text
    • http://raisinshq.pro/hansen_and_quinn_answer_keyja0oa.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/analisis_del_libro_la_tregua_de_mario_benedetti.pdfIn PDF document text
    • http://copyrightram.net/pomigojozefateboxokomukueon.pdfIn PDF document text
    • http://pycnidwzxc.info/what_is_chemical_structure_of_acide3vbc.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/82490546-7b0b-4c37-91c4-5300379bbbe9/outdoor_first_aid_kit_checklist.pdfIn PDF document text
    • http://dojopugoput.epizy.com/fexoxutajebagowir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07a6fd9-ec81-43d0-a60c-92cc5fe84487/bomozowanuganonux.pdfIn PDF document text
    • http://gisoduriri.rf.gd/83388709850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5832f5f5-66ba-42b7-b6f7-a333af9119b4/42064693227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87c2c048-2fed-470a-b05e-75d2188c1050/wudoratasetakiv.pdfIn PDF document text
    • http://simipibenafar.epizy.com/46601793360.pdfIn PDF document text
    • http://wulukexererumus.epizy.com/27664042703.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_off0000fba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA3 5324 bytes
SHA-256: 1c5bae23c2de03d8de0e3726e0b44def95fb4ed22bf589a2ef5283b226553041
font_01_sfnt_off00010da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA8 11256 bytes
SHA-256: 4089064170c4d868c16ec7d57e7cfc45993ce99fc79f1be4f871db49e27f50be

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