Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb72e35a0858601a…

MALICIOUS

PDF

73.0 KB Created: 2021-04-12 02:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a888b7b5c7ce564c858af5ff99917db8 SHA-1: 2abb5f259ccb9a07984500d2acbfdd83eb104cbf SHA-256: bb72e35a0858601ace75086dfa0dc508401427d72b5e240fc8f39e426cd3851e
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. Although no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=ukulele+beginner+songs+im+yours PDF link annotation
    • https://rixukiwifezi.weebly.com/uploads/1/3/5/3/135392959/531ff.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/87652486134.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/liraru.pdfIn PDF document text
    • http://copyright-rules-help.com/ice_cream_cone_costume_girlhirtk.pdfIn PDF document text
    • http://insta-sale.site/crazy_thing_called_love_michael_buble_lyrics2npv3.pdfIn PDF document text
    • https://totibevopomuv.weebly.com/uploads/1/3/0/8/130813722/82947.pdfIn PDF document text
    • http://ledozikatiresev.scienceontheweb.net/34840936629.pdfIn PDF document text
    • http://damomemisogadex.iblogger.org/madhura_raja_collection_report_worldwide.pdfIn PDF document text
    • http://fajivujozivezur.22web.org/26266195228.pdfIn PDF document text
    • http://puzezaxu.22web.org/teori_akuntansi_keperilakuan.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/51991014109.pdfIn PDF document text
    • http://therarbooks.com/exercices_corrigs_sur_les_amplificateurs_de_puissanceaoyqz.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/les_techniques_de_traduction_anglais_franais.pdfIn PDF document text
    • http://damvglaz2.xyz/465091647050d95d.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/walmart_grocery_wont_let_me_add_to_existing_order.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://raredinufewota.epizy.com/beginner_english_questions.pdfIn PDF document text
    • http://xejotapawadi.epizy.com/rerubevebifo.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/lorijuposi.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/23285139438.pdfIn PDF document text
    • http://fawikinego.myartsonline.com/zoxubotuwipokiwu.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_off0000e0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B6 5092 bytes
SHA-256: 9b6b2eea5acc9f6b5f532a2bad7385fb3d6d3cc9ca6c7dbdec3ef2927dbe122a
font_01_sfnt_off0000f205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF205 10836 bytes
SHA-256: fb737985a3bae8260f031c42ca42175298a9ab7c9e786821ecc66f0b9fa73aa6

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