Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b2ab2106d1c583…

MALICIOUS

PDF

76.4 KB Created: 2021-05-18 21:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 87542285903dbc8113d74049ace3d0ce SHA-1: 18fd4cfa2e55aa2b3b548294ca3035b901fa9dea SHA-256: 60b2ab2106d1c5839cd935115c82cf7a3b68c93df93eeffaffe0c9389fb5efae
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://jottigo.ru/strik?utm_term=justin+%2526+dave%2527s+awesome+would+you+rather+game+box+instructions PDF link annotation
    • https://wizojavi.weebly.com/uploads/1/3/1/6/131606290/solojumemi.pdfIn PDF document text
    • http://gekigowegijuvo.22web.org/41802078854.pdfIn PDF document text
    • https://fekifefexil.weebly.com/uploads/1/3/0/8/130815726/voragawasig.pdfIn PDF document text
    • https://davijune.weebly.com/uploads/1/3/5/3/135315517/zekiferagiwagozu.pdfIn PDF document text
    • http://jobatuzuru.22web.org/wevupiluxonel.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/d9312dc1-99fb-4463-bfe5-81b116f2baf7/90389405651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c716f7d2-b411-4e6b-b990-b9ab51bd4553/how_does_the_stock_market_work_in_simple_terms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e68924-77ce-4494-97ab-f55bb0fe6164/mercruiser_4.3_mpi_idle_adjustment.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/nuvikiwosefafekabupakaviw.pdfIn PDF document text
    • http://fexotupakel.rf.gd/best_books_on_indian_art_history.pdfIn PDF document text
    • http://rugefaf.rf.gd/65823866354.pdfIn PDF document text
    • http://gabepan.epizy.com/proper_order_of_adjectives.pdfIn PDF document text
    • http://sisoxonojuta.epizy.com/hard_vocabulary_words_with_urdu_meaning_and_sentence.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/19703217792.pdfIn PDF document text
    • http://pepukogabam.rf.gd/zaxusemanibemikilogir.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/45647615975.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/2019_tamil_movies_video_songs_kuttyweb.pdfIn PDF document text
    • http://befadiw.rf.gd/sabbatical_leave_policy.pdfIn PDF document text
    • http://sifenatedivuvig.rf.gd/11986662602.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_off0000ec11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC11 4324 bytes
SHA-256: ee48d98f5dbdcccd540cf6f26cd4e965abcdfd23c1b22b50a7759905ad265109
font_01_sfnt_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 11912 bytes
SHA-256: 71449a6ac3cfebd7c982a5ac2691cf7c8d2d4d745c3205e565d06e5e5f5cfd83

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