Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e900ae3c00728ac…

MALICIOUS

PDF

89.4 KB Created: 2021-03-24 05:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ac3d067e6f5660d99029bf23602f34b6 SHA-1: 111e31d6f284fe55ae61e24bc521026cf7a97189 SHA-256: 5e900ae3c00728ac190272514692d90d3bca9975a3d2e7da27eeb872347f989c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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://golowaki.ru/123?utm_term=bailar+in+preterite+form PDF link annotation
    • https://cdn.sqhk.co/kaxonavi/hfTgs1C/gubixor.pdfIn PDF document text
    • http://nepizomojafedez.22web.org/xomigivibasisunufe.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/zhgia5e/baseball_card_collection_store_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/fudikeraz/jdHOQ3d/bajomus.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/hdzggCf/como_usar_cabify_madrid.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/jIjegc5/71495865704.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/ohiD2ja/93639619257.pdfIn PDF document text
    • http://wafixevewitope.mypressonline.com/cannibals_and_kings_origins_of_cultures.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/jeUciiH/jumanji_epic_run_mod_apk_1._0_2.pdfIn PDF document text
    • http://fevofawemuwa.medianewsonline.com/employee_resignation_letter_sample.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/10394536251.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vavazewesepato.epizy.com/varizox.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/59026669462.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/sudasadina.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/40615561848.pdfIn PDF document text
    • http://jemavavobeziv.epizy.com/78841894208.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/counter_strike_1._6_warzone_free.pdfIn PDF document text
    • http://debubiduselez.epizy.com/scarlett_2i4_first_gen.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/7062730786.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/rezabimadujozefav.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/what_is_the_best_dvd_vhs_recorder_combo.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/perimibadaxa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE9 3312 bytes
SHA-256: 082c89522e4251f0a814862fddf633b1dac669eb780a02580130c1f52bfffe84
font_01_sfnt_off000106ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CA 4920 bytes
SHA-256: 2ea211ad3f94c93d4fd4c55be7c137fa0eb3e320df1f35378fe89942d10b3a7d
font_02_sfnt_off00011773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11773 12796 bytes
SHA-256: 67caa51d1cf3a785310e556484f911c70be11501be9b6ddccc5b1368b0af72e0
font_03_sfnt_off00014069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14069 16684 bytes
SHA-256: 4cd55fee6c52bbab32ed20b0b25846bff407090075fa0ab45dc9808449a8eeb0

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