Malicious PDF — malware analysis report

Static analysis result for SHA-256 3251a77bcfa9ae25…

MALICIOUS

PDF

82.8 KB Created: 2021-03-31 03:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bc6fead7bd8ebef33d8734ae3b2264d0 SHA-1: 622c9fe815e35a428030dd09b2826bf69c1795c1 SHA-256: 3251a77bcfa9ae25aeedc614354e2d88b58118e3127fb3ccb98b24b61c374074
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://maypoin.ru/wix?keyword=freemason+interview+questions+and+answers PDF link annotation
    • http://bitcoins-profits.com/center_table_in_form_htmlirphy.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/exercice_corrig_algorithme_tri_tableau.pdfIn PDF document text
    • http://gazajujana.mygamesonline.org/dajibaxesixukibikigowowox.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/47507086641.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/52051824717.pdfIn PDF document text
    • http://yourdesk.website/jawegigujolekesadojufuurdd.pdfIn PDF document text
    • http://esmoney.site/54385470673i79vz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://womidelere.myartsonline.com/76327697812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/799c1b6b-c8f0-4d22-9992-b81955fc6ca7/what_does_red_light_mean_on_directv_remote.pdfIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_11c430227a0343d69a3f1c0626ae6485.pdf?index=trueIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_d8b8f816c4d746d9b86b43cb5cc6e3ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/21397589351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7306124-7e83-414a-b2b1-4ae8c9848d78/41407928105.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/york_furnace_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/67166606243.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_fce37a44a6b042d0a0e81d96cb1b8850.pdf?index=trueIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_92a746e6d4894c738bda61c9069fe5f6.pdf?index=trueIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_fe99093241654561b36a9a6ee62a622d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a968e97-048e-479a-99fa-d189be42d410/buganozejusanudi.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/febivixokeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a73a990b-c6d0-4c16-b36d-1fb7e7209575/charter_spectrum_remote_control_troubleshooting.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001087e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087E 5172 bytes
SHA-256: e7b0120a1235a2f5101c4e4a0e11a071b684c5eb3a3e1d55cbe2452d88ada0b8
font_01_sfnt_off00011a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0D 10924 bytes
SHA-256: a04c1097468cc30713dfd680cb979efd4042f4a52a93209c44c198fbf420389b

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