Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e628df682cf82d…

MALICIOUS

PDF

75.2 KB Created: 2021-06-15 11:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 923d9dfdbfdfbd74993aa82d04b26511 SHA-1: 078a6eca5cd156328c2ff93c33da8d30421df6bc SHA-256: b2e628df682cf82dd8cba1470065209f822faf9c032d1e8d28e617753c6382cc
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a domain associated with phishing activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the presence of numerous external links suggests a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://smidgel.ru/pbw?utm_term=how+to+delete+temporary+files+from+android+phone PDF link annotation
    • https://nomikumeparibop.weebly.com/uploads/1/3/4/6/134638052/vefebeg_weramosal_tisefenegabiniw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_5fe7c23a94ebe.pdfIn PDF document text
    • https://semumivotuwebaz.weebly.com/uploads/1/3/4/3/134379403/9293329.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/sapotik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499935/normal_600c0332c58a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454432/normal_604a7b574b2f1.pdfIn PDF document text
    • https://xedovederufag.weebly.com/uploads/1/3/5/3/135315932/dutimaxaxesexawok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimogomaw.pbworks.com/w/file/fetch/144969183/theraja_electrical_book.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/periyodik_sistemde_atom_yarap_nasl_artar.pdfIn PDF document text
    • http://mituxap.pbworks.com/w/file/fetch/144661302/sedupinazitixapeguterim.pdfIn PDF document text
    • http://kejuziz.pbworks.com/w/file/fetch/145293558/zeputulojanupuzuguwup.pdfIn PDF document text
    • http://kekirow.pbworks.com/w/file/fetch/145282380/best_reply_for_thank_you.pdfIn PDF document text
    • http://wepoline.pbworks.com/w/file/fetch/145202931/gatizeniburevoxumebaviwed.pdfIn PDF document text
    • http://puzavofan.pbworks.com/f/libro_de_historia_2_de_secundaria_santillana_contestado.pdfIn PDF document text
    • http://lulatigono.pbworks.com/f/10_snf_biyoloji_1_nite_konu_anlatm.pdfIn PDF document text
    • http://lavavutezev.pbworks.com/f/boating_hd_apk_unlocked.pdfIn PDF document text
    • http://gebozuj.pbworks.com/f/fomiluga.pdfIn PDF document text
    • http://vazesuna.pbworks.com/w/file/fetch/145154898/gabapentin_interactions_with_tylenol.pdfIn PDF document text
    • http://bopelijexuf.pbworks.com/w/file/fetch/144464823/what_is_0.27_written_as_a_fraction.pdfIn PDF document text
    • http://zobafolu.pbworks.com/f/avalon_hill_gettysburg_rules.pdfIn PDF document text
    • http://runavepekid.pbworks.com/f/lgbtq_ppt_template.pdfIn PDF document text
    • http://difusowafid.pbworks.com/w/file/fetch/145287363/maari_tamil_full_movie_online.pdfIn PDF document text
    • http://siruzosu.pbworks.com/w/file/fetch/144758025/jogegoxixufamibefufuwu.pdfIn PDF document text
    • http://zixereves.pbworks.com/w/file/fetch/144689844/a_writers_reference_8th_edition_free.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/f/81931204732.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_off0000e881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE881 5436 bytes
SHA-256: 63a42d9e4eb47e520ef789f135e6e8a6e9b8a62a34d5d3912bcf9973bfc483a3
font_01_sfnt_off0000fae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE8 10796 bytes
SHA-256: 09b9d761f12ab26e4e4d8568af16e7e8bb7e09d38dc1dad0b0db60b06a2228bd