Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc763c68dccc4ba…

MALICIOUS

PDF

73.3 KB Created: 2021-03-27 14:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2121db4c5faa44a059c76e704393c72c SHA-1: b0474e2acad5984bf3084047c0b8ebbfdc6183c4 SHA-256: 8fc763c68dccc4ba6715b62252348577de05d241a56ea220b1eb0c4ba829cebc
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 0.9997

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 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://soxebez.ru/123?utm_term=free+bible++nkjv PDF link annotation
    • http://persequen.com/tesuboputi2zspi.pdfIn PDF document text
    • https://dopakegufa.weebly.com/uploads/1/3/1/3/131384718/nerefubetakitizamid.pdfIn PDF document text
    • https://suwesinorilofev.weebly.com/uploads/1/3/4/0/134096988/xolux-dunubiloxujuji-givoso.pdfIn PDF document text
    • http://useplafond.xyz/no_regrets_price_synonymxygvk.pdfIn PDF document text
    • http://samelike.site/45269584068lpxuu.pdfIn PDF document text
    • https://kominalekawer.weebly.com/uploads/1/3/1/6/131636772/rupazoveguken_tapabono_wevunufosatej.pdfIn PDF document text
    • http://loveantravel.xyz/6018479583owb3j.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/bavodatuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/fevezubera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3997e0cf-e297-4e0b-8e60-408aa5ba8ed2/20975232360.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/62073903296.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/caracteristicas_del_estudio_de_casos_y_controles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a5c6bf-a871-4f75-add8-837d3d2fd6cb/how_to_adopt_from_foster_care_in_florida.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/51126750138.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/72980743295.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/akalicious_party_pooper_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/what_is_entity_relationship_model.pdfIn PDF document text
    • http://duvodix.myartsonline.com/biomass_energy_conversion_technologies.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/hashar_movie_in_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/fenedileli.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_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 4588 bytes
SHA-256: 07ebb3954d29aec6f732f2d09c4662566df67dd6bc840f26d7d6e443f9e7d28d
font_01_sfnt_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 11148 bytes
SHA-256: 7f134fc57b456177420805a6196a4f38e1a28f43c21aa21174df6cc75cf1e5e3

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