Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0fa31f71c1e22c…

MALICIOUS

PDF

78.4 KB Created: 2021-04-02 16:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 242036d502c6f86b9c649b951e197d02 SHA-1: 4359bf637cb082f59ae783ebe9a6c12fa143006a SHA-256: 6e0fa31f71c1e22c3ca687dba351f4c35b2783b3f7adcd67f58232e5855e1af9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, reinforcing the malicious purpose.

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 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://midufefew.ru/123?utm_term=dumb+ways+boffo%2527+s+breakfast+apk PDF link annotation
    • https://cdn.sqhk.co/lefidotoxono/fsiaJZw/i_love_crosswords_3_answers_level_13.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/hjyBAJ3/54976593994.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/gaIhg4h/gokabamoramibaw.pdfIn PDF document text
    • http://pomurofame.iblogger.org/kozuderebibufefirem.pdfIn PDF document text
    • http://befodafojedugan.22web.org/tuberowabajewozuzelume.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdfIn PDF document text
    • http://hookup682.site/self_guided_driving_tours_of_scotlandws64t.pdfIn PDF document text
    • http://handler-autoscout24.com/vexajixanaxoxuzkejps.pdfIn PDF document text
    • http://habercigo.com/fitbit_versa_lite_changeable_bandst9tm8.pdfIn PDF document text
    • http://vefavirona.22web.org/nuvipinejomujotenalisoben.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/sitok/81442506042.pdfIn PDF document text
    • http://velumosak.epizy.com/desh_bhakti_geet_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/how_much_do_entry_level_accounting_jobs_pay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e711c75-f580-4662-ba48-ae5d281da6f4/jim_stoppani_shortcut_to_size_supplements.pdfIn PDF document text
    • http://vabelel.epizy.com/canon_powershot_sx20is_lenses.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/panchatantra_story_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91043b94-a37b-45c2-9976-5230846ad995/kiratuja.pdfIn PDF document text
    • http://nowapuporab.epizy.com/free_printable_calligraphy_practice_worksheets.pdfIn PDF document text
    • http://sogisad.rf.gd/47150992867.pdfIn PDF document text
    • http://mafolizol.rf.gd/5419973783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb7077d-8270-4bee-b6ac-3029cdd67e7a/what_is_december_28.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/sony_dsc_rx100_mark_7_review.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_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 5444 bytes
SHA-256: 25c23e570063f498eab6c2b22c10ff4bddf943ec3842410ef0899f028f51c8d0
font_01_sfnt_off000105a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A9 11216 bytes
SHA-256: c5b173598c5f59494a88da09199412d52c9196bcfbca1b8e5751d751674b75b4

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