Malicious PDF — malware analysis report

Static analysis result for SHA-256 57cd988979ddc669…

MALICIOUS

PDF

76.8 KB Created: 2021-03-15 05:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: abd99936953684f849907889cda8d8e8 SHA-1: 205106763690626cf0b1293e73aa1872cbbd8f3a SHA-256: 57cd988979ddc6691b5517e16694c4f0b048fb7ee79ba0e16e99496b0ef9f035
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 0.9956

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://xezojetit.ru/strik?utm_term=family+feud+rules+pdf PDF link annotation
    • http://xilenemivagola.mywebcommunity.org/xewowujevu.pdfIn PDF document text
    • http://marketeuro.pro/complete_blood_count_manual_cpt_code56e3o.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/desi_panchayat_2000gs6mj.pdfIn PDF document text
    • http://jirafka.space/37486738937izo5i.pdfIn PDF document text
    • http://dkblogin-de.com/kanunexebi2mjx.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/safidajaze.pdfIn PDF document text
    • http://domavera.ru/kafifypqo9.pdfIn PDF document text
    • http://myimperfectmomlife.com/bufotuduxokunaxorotemarodh0lq.pdfIn PDF document text
    • http://esagafow.fun/fabulakomipajuruzakonurarr236.pdfIn PDF document text
    • https://sezalufuveded.weebly.com/uploads/1/3/4/3/134389043/niragutigotu.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/4ba90838610ff7e.pdfIn PDF document text
    • http://qrastenmap.online/76455245742mxciw.pdfIn PDF document text
    • http://markettop.pro/fordlandia_ielts_reading_answer_keydxdz3.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/10266327718.pdfIn PDF document text
    • http://stassikorskyi.com/vegan_breakfast_ideas_quickahw02.pdfIn PDF document text
    • https://xojenupikubola.weebly.com/uploads/1/3/4/7/134747345/7425095.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/601834b9-4caf-4024-9440-2323331b1e2a/arduino_and_raspberry_pi_projects.pdfIn PDF document text
    • http://jesasudazewur.epizy.com/jitij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4340a843-c208-4564-92d3-2d5a4867f07d/2018_forester_xt_reliability.pdfIn PDF document text
    • http://rumobejijavof.rf.gd/american_heart_association_afib_guidelines_2014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b31565-03cc-4219-b7ab-de5c74b0670b/how_to_download_autocad_lt.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/vlookup_all_formula.pdfIn PDF document text
    • http://gokixedotoj.epizy.com/2317100203.pdfIn PDF document text
    • http://nogomazarem.epizy.com/68182026399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9846aa2f-2409-4518-b1b9-94fc16e9e94f/voxunuladerolilojizojogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/719b2f81-07cf-4f21-bc56-65ebd3aa2462/vuvalikukolesejaguzena.pdfIn PDF document text
    • http://totiwofosu.epizy.com/conversation_anglais_francais.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_off0000ed9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 5244 bytes
SHA-256: 3d4af67a91ab9210e3cb70db24a5c304346723dcee8f692f73061903f8769c78
font_01_sfnt_off0000ff6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6F 10788 bytes
SHA-256: 867d823e2fbdc57e78af61d6f107566003ac27378c22f96efe323cff65aa9ce5

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