Malicious PDF — malware analysis report

Static analysis result for SHA-256 f846f5a817f49aef…

MALICIOUS

PDF

79.0 KB Created: 2021-03-12 16:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1d9fd4373cc1f13cf641ffcb5862b751 SHA-1: b2c18f9f671de0bf56c291c6a605def487e05b03 SHA-256: f846f5a817f49aefd794c7b7be2fec94df42212dba0aff8af88a595a006df092
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-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.
  • 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://gimoguvi.ru/123?utm_term=chatrapathi+ringtones+naa+songs PDF link annotation
    • https://kokujilu.weebly.com/uploads/1/3/1/4/131453241/xuwovol-zametukapes.pdfIn PDF document text
    • https://zexawowa.weebly.com/uploads/1/3/6/0/136081798/9732292.pdfIn PDF document text
    • https://kivobuduzuv.weebly.com/uploads/1/3/0/7/130739084/garot_manegefosepavax.pdfIn PDF document text
    • https://gikowotezura.weebly.com/uploads/1/3/4/4/134493608/zumagevitug_reperavanowasu.pdfIn PDF document text
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/2847f837d.pdfIn PDF document text
    • https://gawigunemotiri.weebly.com/uploads/1/3/5/3/135320142/dcdf00461b.pdfIn PDF document text
    • http://wuwodijutorem.iblogger.org/aadhalal_kadhal_seiveer_aararo_songs_masstamilan.pdfIn PDF document text
    • https://bufoteno.weebly.com/uploads/1/3/4/8/134851237/6446637.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://tuxusajef.rf.gd/mini_dvi_to_male_vga_cable.pdfIn PDF document text
    • http://jomozaredid.rf.gd/tanixekabunalab.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/sanabaxonopepugoxowodo.pdfIn PDF document text
    • http://veveliwuw.rf.gd/fapuzifudagogewikiru.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/24565799452.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/tujosuvuxawobosumurexub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe6f1e0-082f-43c7-b122-4499c2ae64d3/vozuxabuwu.pdfIn PDF document text
    • http://nelodetasa.rf.gd/carrom_disc_pool_mod_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/instructing_counsel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/former_governor_of_benue_state_arrested.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e25760e-c90f-44ad-a0c1-fa940ab4bd08/89109194830.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B6 4952 bytes
SHA-256: 7e0647e70f83b690019e8f8722bd003980f31826961efb58c9e712437a46a529
font_01_sfnt_off0000ea8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8A 10580 bytes
SHA-256: 71f0a68f6faffbb77b99ec1ec6223975292554fe1c1b39f2fd4b55eccbf715c9
font_02_sfnt_off00010ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC3 16076 bytes
SHA-256: 20dc835fdb26e5c8b2bf371a74de3f1f2251d0d540cd54084ecb3d27d8cc4587
font_03_sfnt_off000123a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A4 2572 bytes
SHA-256: 1f657563951b2e0a01504ee2388c53b78236424147ad5c3684fb63e83826814a

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