Malicious PDF — malware analysis report

Static analysis result for SHA-256 780010196797116f…

MALICIOUS

PDF

82.8 KB Created: 2021-03-15 19:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1e3de771932801726fe558f02bcdf5d SHA-1: ee62dcc238f2e14b9342e3f52d99be5152fe7309 SHA-256: 780010196797116f0e93083c49beb52dca98adca696ea4295078ce7f9fc6fefd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including a link farm detected by heuristics, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier flagging further support its malicious nature. The embedded URL 'https://resalured.ru/aws?utm_term=how+to+type+a+book+title+in+apa' and the PDF link farm 'https://cdn.sqhk.co/zezetemirag/ANLzifM/bingo_tea_argyle.pdf' are high-priority IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/aws?utm_term=how+to+type+a+book+title+in+apa
    • https://cdn.sqhk.co/zezetemirag/ANLzifM/bingo_tea_argyle.pdf
    • http://idealslimitalia-oficial.site/oxford_korean_english_dictionaryvbuja.pdf
    • https://cdn-cms.f-static.net/uploads/4506200/normal_5fda925558bf7.pdf
    • https://static.s123-cdn-static.com/uploads/4461249/normal_5ffff6fa31b46.pdf
    • https://static.s123-cdn-static.com/uploads/4459025/normal_5fdfbb220734f.pdf
    • http://loveworld.club/how_to_export_garageband_ios_to_wavkjq14.pdf
    • https://cdn.sqhk.co/nerurepaza/gixmcif/virtual_barber_shop_3d_audio_download.pdf
    • http://terem.space/17881110344960h0.pdf
    • http://bufo.online/lobidunergrc4.pdf
    • https://cdn.sqhk.co/merabuvi/ieV8Ahe/57456977123.pdf
    • https://cdn.sqhk.co/bodavadu/6he2BM4/murometagifi.pdf
    • http://vizionsmc.net/of_plymouth_plantation_book_2_summarymh3oa.pdf
    • https://cdn.sqhk.co/vumusokutil/foigcfG/vowixajomuperivaritalik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_b8400cc5a3d04b5f8f732420514ae69d.pdf?index=true
    • https://s3.amazonaws.com/wujixus/90870888082.pdf
    • https://s3.amazonaws.com/xidulumexi/aster_aweke_new_song.pdf
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_679c00d3c9d84d44b137f0f5ff8769d0.pdf?index=true
    • https://s3.amazonaws.com/saxefi/22831470134.pdf
    • https://s3.amazonaws.com/bitajemisajoz/capacitor_types_and_uses.pdf
    • https://s3.amazonaws.com/bejikefowu/cognos_report_studio_count_distinct.pdf
    • https://s3.amazonaws.com/zubuwujoxom/peside.pdf
    • https://s3.amazonaws.com/wazagidonux/cartesian_coordinate_graphing_worksheets.pdf
    • https://s3.amazonaws.com/nedijowewoded/definition_of_formalismo.pdf
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_6a13891f025e4ef8b37ca9962f325fae.pdf?index=true
    • https://s3.amazonaws.com/takebemanijewok/natamab.pdf
    • https://s3.amazonaws.com/muvarelo/odia_whatsapp_shayari_video.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010508.bin
361a38f8ae864a555d8f8a17bcc546d3e2d6dd2335883aac8eb4a6ed9051d92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10508 4896 bytes
font_01_sfnt_off000115db.bin
461ff7aff8d0ca59fb39348548fdc222009219845b94b8f8ecb21fd648db9bee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115DB 11108 bytes

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