Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3bb23bd21093f24…

MALICIOUS

PDF

76.8 KB Created: 2021-03-15 20:07:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d46ae3effbbbe170426a7390f23575f0 SHA-1: 3c00aadef82ee19bb6a40fa112cb77e58e91585b SHA-256: f3bb23bd21093f245da7321e364d667a8b4def7d8dfdd8737d51ed37dd1da5b0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xezojetit.ru/aws?utm_term=motorola+vervebuds+300+price+in+pakistan PDF link annotation
    • https://sanituwinera.weebly.com/uploads/1/3/1/3/131379206/64ea723afd.pdfIn PDF document text
    • http://zazeteku.iblogger.org/fishing_guides_portland_or.pdfIn PDF document text
    • https://zuvaxufar.weebly.com/uploads/1/3/5/9/135993026/patudizafa_fetus.pdfIn PDF document text
    • http://wubosilafusim.iblogger.org/banana_zoro_mama_yangu_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d98541ff-5f8f-4f06-bf97-f4c25cd1e13c/degeneracy_of_hydrogen_atom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e08fe733-2cad-4204-a318-af8c2d6d02d1/how_much_is_a_nintendo_ds_lite_worth_now.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/78501604556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3193c4e1-ce9a-457b-bfe8-d32bf3b9f5a8/32042096473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb2c3738-7125-4ec6-873d-c32330e01f3b/32160218309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc7018f2-5d52-4361-af7e-9f66d6b4184a/what_is_the_top_speed_of_a_49cc_moped.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/2135514602.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/depogimanazin.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/nebabuvirixunazotugebamub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83fbec7-e622-4673-8b44-e9445636278b/23450391567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e8527c-c939-4b11-b131-eb4225a57924/how_to_write_research_proposal_for_phd_in_computer_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25fdf144-2f03-41d6-81e5-aade75de24f5/larufedamilesuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154b35a1-bc67-4533-8934-c2a0d60184de/sylvia_plath_the_bell_jar_espaol.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04E 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000e135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE135 5524 bytes
SHA-256: 45f45a82dc0d5cc1b86012642aa2e14d8c411ddc562fa8c2598438489038f11d
font_02_sfnt_off0000f40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40A 10428 bytes
SHA-256: 0d1de05a0ee3d5a298e86491e2ff1950f801e3b04a9f36721d848b0bdc1bc336
font_03_sfnt_off00011786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11786 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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