Malicious PDF — malware analysis report

Static analysis result for SHA-256 1752fbe8e61aad0b…

MALICIOUS

PDF

78.8 KB Created: 2021-04-04 20:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a36f7f01612075a0cf356f317e062a3b SHA-1: b923733a30e6566bbf3fd0c62a0e334cf81954c6 SHA-256: 1752fbe8e61aad0b00a9597858fb3648ab4e68ffe527bcc2e37285e73ab0792b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/strik?utm_term=all+android+os+list+for+pc PDF link annotation
    • http://nazorizuz.medianewsonline.com/kehinde_buchi_emecheta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_6034072eee274.pdfIn PDF document text
    • http://weareanonymous.org/murray_38_riding_mower_baggera22xi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462678/normal_5fc94d3a97e2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452845/normal_5fee12ed57039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5fda01e2a4443.pdfIn PDF document text
    • https://riwoxevasesu.weebly.com/uploads/1/3/4/3/134327075/pixofetazokufijowag.pdfIn PDF document text
    • http://sethel.xyz/river_flows_in_you_lyrics_meaning2odr4.pdfIn PDF document text
    • https://mukojemugasab.weebly.com/uploads/1/3/5/3/135314074/1116606.pdfIn PDF document text
    • http://ro-shop.space/pidabofewatudakinuxifab799qi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_600f5f27ad331.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://keporeninudo.rf.gd/baptist_articles_of_faith.pdfIn PDF document text
    • http://dufosulux.epizy.com/xolelapal.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/28596469284.pdfIn PDF document text
    • http://gibidapasajug.atwebpages.com/26016272428.pdfIn PDF document text
    • http://ketanuviz.epizy.com/81958981365.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/paul_eluard_libert_cm2.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/51866201717.pdfIn PDF document text
    • http://dafesofuxub.rf.gd/2012_chevy_impala_ltz_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/chocolatier_2_secret_ingredients_full_version.pdfIn PDF document text
    • http://gofumakexoj.onlinewebshop.net/positive_and_negative_character_traits_list.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/aact_activator_windows_10.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_off0000f601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 5140 bytes
SHA-256: 286c685f3fa80379ce7bdce8878b4f7da400d9d658b5fafaa9a440edba5de402
font_01_sfnt_off0001078e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078E 11024 bytes
SHA-256: 7510d36b21ea33aa0244948d287487e1e99ce540cb74cbbb657095df5cf662d2

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