Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f16fdac74cc55b…

MALICIOUS

PDF

81.5 KB Created: 2021-03-25 17:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 19e8d4a06fbbc997a7aa1250fe3037b0 SHA-1: 607b875b29ab0083993f66dbc3cb81960cceafde SHA-256: e5f16fdac74cc55badbb7c2a1ca5bc8da4572a73406818a806731fc70cff4c23
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 0.9993

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://botokaw.ru/123?utm_term=artist+cv+template+google+docs PDF link annotation
    • https://cdn.sqhk.co/kawinojos/hipvhdG/debusupisagalume.pdfIn PDF document text
    • http://nigasheff.xyz/zidadadxeg5x.pdfIn PDF document text
    • http://adminhalil.com/772847632299dzw5.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/hUhbhfK/9528245673.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/HymjamJ/nautical_life_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bijilixiger/gdYvxid/gozav.pdfIn PDF document text
    • http://magic-world.site/cedrelopsis_greveih678h.pdfIn PDF document text
    • https://cdn.sqhk.co/tisumusef/4kB3hjb/one_epic_knight_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_d5bc7174895b4be79abb620af87ab942.pdf?index=trueIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_06cca97f2242494ab05a3098a940a5a1.pdf?index=trueIn PDF document text
    • http://sonunujudul.rf.gd/22370958318.pdfIn PDF document text
    • http://voradalupusar.rf.gd/90219094181.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/54442677928.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/pidenozopafapititi.pdfIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_68131346fbe049ea8f2cf608d8fa654e.pdf?index=trueIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_5d2c337568804bbebb8f72667e8e2c08.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/what_does_dog_in_the_manger_mean.pdfIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_24197cd37eba4d338df74735cf47314c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/meleludagajapir.pdfIn PDF document text
    • https://00eaa6b3-f026-4720-b00f-fafb40066352.filesusr.com/ugd/d498be_3f0e60815cbb4dd1b8c50301012cf39f.pdf?index=trueIn PDF document text
    • http://lofidofo.epizy.com/what_is_newtons_third_law_of_motion_also_known_as.pdfIn PDF document text
    • http://noniwelabezona.rf.gd/genetic_programming_tutorial.pdfIn PDF document text
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_691dfd3cbf314fb2964d59be391f4202.pdf?index=trueIn PDF document text
    • https://0ffdd24b-620b-4f4d-94ef-a39da1ca20bd.filesusr.com/ugd/853ce2_c0dd3daf398c42028d625e178b81ed04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/icivics_the_enlightenment_answers.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_off00010004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10004 5444 bytes
SHA-256: e5ca9ba481b065e66b46d31d1d4701c692fc2fffb79a3104d5a3c3930fac95e8
font_01_sfnt_off00011278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11278 11152 bytes
SHA-256: ab1714b4112179280696d816f71496a17dc11a5489d49ba15e8d5eace845ca01

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