Malicious PDF — malware analysis report

Static analysis result for SHA-256 632ac596afccba58…

MALICIOUS

PDF

84.7 KB Created: 2021-04-15 02:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 89bc7b376e76aa776aaa940104305b23 SHA-1: 2e2e3a424bc2447781691869b40f678632f7cb3a SHA-256: 632ac596afccba58b83eca57fe84604eab3ec8af4758bf3d6ca3aecd0b76a892
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=music+notes+chart+printable PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462354/normal_5fe0532e28d05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_605fa48f08b83.pdfIn PDF document text
    • http://rankingcoach-seo.com/how_do_i_configure_my_router_as_an_access_point0fl80.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/ysifNY3/girl_voice_record_download_mp3.pdfIn PDF document text
    • http://myfirstsite.xyz/bahubali_full_movie_telugu_mp428tkq.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/ggijgiN/43061643472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_6022ddd86de15.pdfIn PDF document text
    • http://mybestchan.online/nasigiwibijipawavxsqnz.pdfIn PDF document text
    • http://goloszauniver.fun/zovizut61zv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_600b9a9c8bd7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486199/normal_5ff75ab348680.pdfIn PDF document text
    • http://frut-tree.site/bivewufekofesarexena8f7x1.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/UQzghV7/best_mobile_bitcoin_wallet_iphone.pdfIn PDF document text
    • http://rent-nout.site/native_american_short_stories_for_high_school52mjo.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/ijdcjiP/nodokeximaramuxodanixok.pdfIn PDF document text
    • http://mesretly.xyz/how_to_study_for_maryland_permit_test5ihoy.pdfIn PDF document text
    • http://jakartapro.xyz/78058314854xoyhg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381543/normal_5fee0cb437a52.pdfIn PDF document text
    • http://003-center.ru/who_moved_my.cheese_booklzeej.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/jdcjfjg/android_9._1_huawei_nova_3i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446400/normal_606d565395bd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C1 5048 bytes
SHA-256: 41ea0bbfa891aa5d739e76d05f442992d4b3d9cd083345e5cc28a0ce0be5bd41
font_01_sfnt_off000111d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D7 10896 bytes
SHA-256: eae37f686575d73b22df60c2209852ee14c3f2189166b4692256dd971d0a5d46
font_02_sfnt_off00013720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13720 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.