Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d9d0b82a9852dd…

MALICIOUS

PDF

96.9 KB Created: 2021-03-30 19:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b666fcfd1e02537d87bdd94aea0fc94 SHA-1: 76a6886855fe496c721923db81496417075a4793 SHA-256: a8d9d0b82a9852dde881d4dbaaa2b0c9d4de655b03823010a2d5dfe9a6ef0589
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which appear to be part of an SEO link farm. The primary URL suggests a lure related to 'Bulgarian names and meanings' to attract clicks. ClamAV and ML classifiers strongly indicate maliciousness, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=bulgarian+names+and+meanings
    • http://getcreditreport.info/badass_pet_namesrbda5.pdf
    • http://heymama.store/mrs_pugh_anniemykth.pdf
    • https://cdn.sqhk.co/foropogajag/IQ4Sjjf/versace_chain_reaction_sneakers_grey.pdf
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/3eff78bea.pdf
    • http://whalesqpa.fun/sentence_structure_worksheets_3rd_gradesf20o.pdf
    • https://cdn.sqhk.co/pawapoma/qhfjfjb/62352167446.pdf
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/nipogiwawiwaxemis.pdf
    • https://jadegivi.weebly.com/uploads/1/3/4/8/134851053/bb0d2b.pdf
    • http://study-english-04.space/44566011371w1rfk.pdf
    • https://kototavuwo.weebly.com/uploads/1/3/4/6/134696015/tadibupiluketiteniri.pdf
    • https://cdn.sqhk.co/rutunidosaw/bhehdV7/digetiwobidedukovutapoxix.pdf
    • http://storeplus.info/37098642523v1kmd.pdf
    • https://cdn.sqhk.co/jifedibodo/8hfEghC/fullmetal_alchemist_game_para_android.pdf
    • http://winoorama.website/dikiwidamijoz8lfv.pdf
    • https://cdn.sqhk.co/gaxudofexal/Aa1haPk/idle_web_tycoon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://datatoxozapi.epizy.com/kidisinozebeka.pdf
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_da4cd4a76bd04e2b8d01d0f66e7e6646.pdf?index=true
    • http://vibotiguxux.rf.gd/class_10_book.pdf
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_35715ffdbcfe4736954fcda397f9cd66.pdf?index=true
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_80188db074ae45bbaff09c979e571ecf.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114bc.bin
5c1cd099c2e8d5c1f79b9d7149fc97024f06e458efdda77b4076dbcf5acc35a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114BC 5192 bytes
font_01_sfnt_off00012650.bin
4d78ba00fea8de02dab7dbd34e3b69fdef8b7c71850790ace6f03dd5dedb645b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12650 18944 bytes
font_02_sfnt_off00015ee8.bin
fff8cbb8b468bb3ac486d6a19364b2762c3baa20cccf140af08d9169ec1c6ecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE8 16304 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.