Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c6dd47b3d3c320…

MALICIOUS

PDF

68.3 KB Created: 2021-02-21 23:39:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7e747197db4d0a2e77e477667ef068af SHA-1: 590519263c4b9e0d1b53c23e53ec70e172953845 SHA-256: 27c6dd47b3d3c320c8a8bba566bd56fbc2f7dcd195bdd65f663b3a8fd7df9c71
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://maypoin.ru/wb?keyword=outta%20here%20longwood PDF link annotation
    • https://cdn.sqhk.co/dimumaneda/jd18RLg/383303849.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/3hjdia0/word_meaning_pet_peeve.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/4Phg3zl/milling_machine_cutting_speed_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/7zhd4KF/rotibekatamopatakit.pdfIn PDF document text
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/cf86591c1.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/hakMgev/19961994162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416919/normal_6024fe0e4ed3a.pdfIn PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/4867810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474465/normal_5fd0d507d7e75.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/hiAXieE/lufokepixij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450046/normal_5fcdf429ec49f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384459/normal_5fe598d36e95a.pdfIn PDF document text
    • https://cdn.sqhk.co/xojurolaruk/dYXfgiJ/putanimizijafik.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/1gjPzih/tuginijimutenasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379053/normal_602d1f5c6d412.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/dQxl5eE/ice_cream_blackpink_ariana_grande_lyrics.pdfIn PDF document text
    • https://kopopoxewa.weebly.com/uploads/1/3/4/5/134597570/2651913.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/vonuxagupeduze/haunted_house_1_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/canteen_time_song_of_chhello_divas.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/moxureledawozud.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/didiboguxoponexuna.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_off0000cde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE3 5028 bytes
SHA-256: 2b658a9c025f4cce3a0220e45de61eb4d82d1e7bbf300d31e7646a0d0fcb68a7
font_01_sfnt_off0000df01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF01 11044 bytes
SHA-256: 5451a74c8d8b34a74c7868b2cac90c9c978b4c6cc1862b2d457926b9d4dff34d

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