Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b5d424e692dba2…

MALICIOUS

PDF

82.0 KB Created: 2021-03-04 14:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 66109575fa3e7197cf0f90ca50a6a939 SHA-1: 46aceac5aea1c8f1ab9d26d449458af0927c8ba8 SHA-256: 12b5d424e692dba29b54d29c85c47d93284c438cb80730aeabf0c5a92c95ea0a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, embedding numerous external URLs, some of which are on disposable hosting. The primary lure appears to be a search query related to religious texts, likely a pretext to drive traffic to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/strik?utm_term=what+is+god%2527s+real+name+in+the+bible PDF link annotation
    • https://famogapev.weebly.com/uploads/1/3/1/6/131606489/3b155674.pdfIn PDF document text
    • http://zerkalo-fugicar.website/horror_movie_finders_keepers1gru4.pdfIn PDF document text
    • https://fanonobumoxevo.weebly.com/uploads/1/3/1/3/131384335/1393332.pdfIn PDF document text
    • http://stingeksoj.online/libros_de_negocios_internacionalesieege.pdfIn PDF document text
    • https://kekisadubivef.weebly.com/uploads/1/3/3/9/133986731/fceb5f369d5dc.pdfIn PDF document text
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/rofisugaxubiwa.pdfIn PDF document text
    • https://vifutezovabul.weebly.com/uploads/1/3/1/4/131408528/159d8a0eeb297.pdfIn PDF document text
    • https://natapoja.weebly.com/uploads/1/3/0/8/130813782/a7e0a0.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/gigogitad.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/770423.pdfIn PDF document text
    • https://wexasubofuxumeb.weebly.com/uploads/1/3/2/7/132740188/4152049.pdfIn PDF document text
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/8975482.pdfIn PDF document text
    • http://housefashion.ru/povogexatodumumxmz2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_acc2e60758bc43e5a637ef57b0ae913b.pdf?index=trueIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_6ace716afbf946cb878dfb9879e2d7bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca0b2e0-8d43-486e-ac71-23d91f8be969/97437400674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/468c6461-2ad0-4ee6-ac92-07dc21484c46/alesis_dm10_snare_problem.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_879ad5d9df1b4878b43a90c651b60970.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebf6404-35e5-430b-9724-4f20ed1ee87b/39494584263.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_9ca5a8bdf3a846bcbaf77a975a36a3c6.pdf?index=trueIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_5759e5710276405b8f5189a37e099e1d.pdf?index=trueIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_ce07080845854470b8de2bce2ef330f0.pdf?index=trueIn PDF document text
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_3c78662358aa468a820625be2ba2d5e7.pdf?index=trueIn 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_off00010465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 5428 bytes
SHA-256: 573dc102eb64732d7a56a63c9212da009de16939aca5e76e78adc29460c369b0
font_01_sfnt_off000116bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BD 10540 bytes
SHA-256: f56767e5e02966ff1c9af2491c69638e1b079857f5371deba12b9324fb87105c

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