PDF malware analysis — malicious · 533024a99b359cfa

MALICIOUS

PDF

79.3 KB Created: 2021-02-15 22:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14

MD5: 47bd38ac951e11acb2fb651dc968bcb4 SHA-1: 3507997e8c7fa7d3b9d1f11c5130105d5cc41117 SHA-256: 533024a99b359cfaa16d1f177f236eaa9eb5caf94ac9df7bfa4bac38bdf5561d

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm or phishing operation. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous unknown URLs strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm activity are indicative of a campaign designed to redirect users to potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=right+triangle+word+problems+calculator PDF link annotation
- https://zewerigavuj.weebly.com/uploads/1/3/2/6/132681779/a98604ad9c3e.pdfIn PDF document text
- http://onlyforyou.space/noxadoluboxitoxgqvc3.pdfIn PDF document text
- https://fosovumukudire.weebly.com/uploads/1/3/4/2/134235423/rigotojulawapagaz.pdfIn PDF document text
- https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/damabi.pdfIn PDF document text
- https://cdn.sqhk.co/tajudozizif/iafidhf/hollywood_undead_paradise_lost_chords.pdfIn PDF document text
- https://cdn.sqhk.co/pukikojat/gcijjd0/49383972158.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462096/normal_5fd8a16fbab6c.pdfIn PDF document text
- http://profapp.pro/agenda_docente_2020_para_imprimir9k1k3.pdfIn PDF document text
- https://nugasoxitobaj.weebly.com/uploads/1/3/2/7/132710773/7f4c59990567d.pdfIn PDF document text
- https://kizifafub.weebly.com/uploads/1/3/4/7/134714450/158c6f3f5315783.pdfIn PDF document text
- https://ketafimevudo.weebly.com/uploads/1/3/1/6/131637081/520d7e8b62f6385.pdfIn PDF document text
- http://getyourcredit.info/english_hd_movies_free_for_mobilehimtv.pdfIn PDF document text
- https://cdn.sqhk.co/rejinujo/Lhhjfgi/galaxy_shooter_space_shooting_online.pdfIn PDF document text
- https://cdn.sqhk.co/foxidagon/hbz7ihO/fonts_download_for_pc.pdfIn PDF document text
- https://pesaladijij.weebly.com/uploads/1/3/1/3/131382382/jajaxu-rusagawoxo.pdfIn PDF document text
- https://pawimugonuri.weebly.com/uploads/1/3/4/8/134882006/88c3a049c.pdfIn PDF document text
- https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/e6d630b344589.pdfIn PDF document text
- http://legendnat.space/jigelalafuritoduvugflfr5.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/tinajabizoreguf/90482853103.pdfIn PDF document text
- https://s3.amazonaws.com/kujesulad/english_worksheets_for_grade_2_printable.pdfIn PDF document text
- https://s3.amazonaws.com/xeponodij/rangi_song_by_ambassadors_of_christ.pdfIn PDF document text
- https://s3.amazonaws.com/geradi/find_duplicate_values_google_sheets.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f190.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF190	5728 bytes
SHA-256: `f409c64441ca9a5d6e5fe55e57b3ba766b64b4026c6031dff88eacb40ec46988`
`font_01_sfnt_off000104ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104EF	12344 bytes
SHA-256: `a11905101726d6a35a4f0c0fdf82f3c2c3b6f8d00b68e83f280d4d623131fd2a`

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