Malicious PDF — malware analysis report

Static analysis result for SHA-256 afded55354b5780e…

MALICIOUS

PDF

70.4 KB Created: 2021-03-15 19:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 11c0162a55da7d03e4bb2905ae7ae724 SHA-1: df6a9e761111da540b03edd83ba4cb1cc04eabd8 SHA-256: afded55354b5780ec370d836728f6cdf0b9f5998a79c6abde8586e5fb07433d5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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.
  • 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://golowaki.ru/wix?keyword=online+volunteer+opportunities+for+college+students PDF link annotation
    • https://cdn.sqhk.co/litawoxelida/ighdJib/2257466271.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/1zSVl6P/tonexalurove.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/jgha6hb/90074610916.pdfIn PDF document text
    • http://sizegoduxuxa.mygamesonline.org/xudekalo.pdfIn PDF document text
    • https://cdn.sqhk.co/tatolodam/ifgd809/music_lab_songs_youtube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369626/normal_5ffc56052e5ba.pdfIn PDF document text
    • http://metumudape.iblogger.org/subordinated_debt_equity_on_balance_sheet.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/57395918316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_6031588cca932.pdfIn PDF document text
    • http://lezobul.medianewsonline.com/gojesizudaxerusa.pdfIn PDF document text
    • http://tonojodozif.mypressonline.com/9369745602.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/ic7Slgj/god_of_war_playstation_2_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_c2c79c8d8a13493c9086675ae0a428ee.pdf?index=trueIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_d2e856c0042b48c692a1e3152b792289.pdf?index=trueIn PDF document text
    • http://rogomore.myartsonline.com/1001_nights_arabic.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_d0c3dc94e9134140ad4a518a5dfcbeda.pdf?index=trueIn PDF document text
    • http://sarozusu.epizy.com/las_edades_de_lul_resumen_pelcula.pdfIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/list_of_acids_and_bases_with_formulas.pdfIn PDF document text
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_21ba3d916f4141d9895507cf1fe028a8.pdf?index=trueIn 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_off0000d746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD746 5200 bytes
SHA-256: db6139cad02df5b1f507c83f0628362d2005ebacc117773c5a2f181c0a6a08fb
font_01_sfnt_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 10332 bytes
SHA-256: d4c19b3b1804064889c58bcf5d379ed0a05850ccb1fb155dec56192698edd6a6

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