Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7719884b25a2e7d…

MALICIOUS

PDF

96.7 KB Created: 2021-03-25 10:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1aad657c7a3387764f0a7b8765fd4539 SHA-1: a25a00e8155f8277a72d1f001ad48e63127928cd SHA-256: e7719884b25a2e7ddf9de33fa12efde6a150e847153eab1a8d2c668b21a671e7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm with numerous external URIs hosted on disposable domains, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the embedded URLs are the primary indicators of compromise.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=multivalued+attribute+in+relational+schema PDF link annotation
    • https://cdn.sqhk.co/retagigimusa/gdEmtid/obstacles_syd_matters_guitar_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/hgghieO/legogokobedowepozifaro.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/hieYN3G/xebugu.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/hiaghic/12477186974.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/j3gdia5/2817114177.pdfIn PDF document text
    • http://tuvosudokalidu.scienceontheweb.net/20781776514.pdfIn PDF document text
    • https://cdn.sqhk.co/duzixulok/ijhfifL/66318289499.pdfIn PDF document text
    • https://cdn.sqhk.co/novimabe/sGifpCL/punijawi.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/power_book_2_ghost_cast_cane.pdfIn PDF document text
    • https://cdn.sqhk.co/vibefoparo/fijhjii/jemilofunerogozaner.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/hi0xgjB/nfs_heat_studio_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/raguwubives/DhdhVfE/sound_equalizer_iphone_spotify.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/sociology_a_level_education.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/hKWgdAh/75892974502.pdfIn PDF document text
    • http://maritimog.medianewsonline.com/bv_ramana_engineering_mathematics.pdfIn PDF document text
    • https://cdn.sqhk.co/noretokujazo/MLRbqhg/electric_trains_near_me.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/29560857647.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/test_your_english_vocabulary_in_use_advanced_second_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pudolajuji.atwebpages.com/2958449617.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/kosenijebarimakezo.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/binding_of_isaac_cheat_sheet_rebirth.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/tuzirunatakitoxil.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_off00013b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5E 5384 bytes
SHA-256: 51196f121c928b9355d60e4f6544d79077bacdcdf80e46b3aa8050c688ee2668
font_01_sfnt_off00014d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D92 11620 bytes
SHA-256: e9b0fbcd64d054fcd9870835077dc2e8148eaa956b37c372a6be2861b426b11d

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