Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52d7567d3fd5a8d…

MALICIOUS

PDF

88.3 KB Created: 2021-01-05 20:30:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 5c8a9199390e3e77531931672308af08 SHA-1: cc0a468c35c39374a06fb6bbf9b8a6493f925a48 SHA-256: e52d7567d3fd5a8dd05513e5b26d75f3d31766ce91960287afa7bd6f643667ac
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The document body, though partially corrupted, contains metadata related to 'wkhtmltopdf' and a search term for 'Swan lake theme piano sheet music free', indicating a deceptive pretext for the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/aws?utm_term=swan+lake+theme+piano+sheet+music+free PDF link annotation
    • https://cdn.sqhk.co/denepepunuja/njdn1Es/mobile_facebook_photo_size.pdfIn PDF document text
    • https://cdn.sqhk.co/pitadewedobu/cnhgdRn/wynter_zombies_2_costume_party_city.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/sivovawi.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiliziv/ideggij/jojajizilibem.pdfIn PDF document text
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/8ebdc1d317.pdfIn PDF document text
    • https://cdn.sqhk.co/piwixesiwufo/bgdqgeh/baby_tv_song_lyrics_i_saw_bears.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/gejbMhc/13613381361.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/fokapikow/gumunegu.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/prairie_grove_school_district_46.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/california_lcap_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/anaganaga_o_prema_katha_songs_ing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd17abf-d784-4d88-ac4c-b8bb6443a474/bunn_nhbx-b_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46653b67-1eb6-40b9-bc81-d463b9e4821b/kugawegiwijefu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001063e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063E 5512 bytes
SHA-256: 24af182c945b6753ea3fb38fae5a116ad3b8e873ae93283713b71e8e40a8f0f5
font_01_sfnt_off000118e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E4 11364 bytes
SHA-256: 2be8fd1b9b58965db5ce372177113724eae98f2399ae963d8cd2a23dba192d3a
font_02_sfnt_off00013f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6D 16100 bytes
SHA-256: 9cfb948b915a4694feeb7f8719f2b65905b0a58e2ed918074a610570d07e7249

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