Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd4c411ce3d23ca…

MALICIOUS

PDF

71.0 KB Created: 2021-03-20 07:11:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 907261b13466769ce11b2142fc949f9e SHA-1: dc53f0cb316bb6a46e460e2b7d82c13dc4a935ff SHA-256: ebd4c411ce3d23ca757ec7ee4643a6e0672119d6504a34a9ddacaa81381150d2
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing infrastructure. The document body, though heavily obfuscated, contains text related to ordering numbers, likely a lure to disguise the malicious URLs.

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://jacksth.ru/award?keyword=ordering+5+digit+numbers+worksheet+pdf PDF link annotation
    • http://vubitim.sportsontheweb.net/places_to_donate_furniture_in_nyc.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/zilubut.pdfIn PDF document text
    • http://disetikala.22web.org/admission_open_full_hd_movie.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/nudibunixowurogevikubu.pdfIn PDF document text
    • https://xonunomimir.weebly.com/uploads/1/3/2/6/132681278/b3e0ca50cd055ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e6c4f0b-3406-4274-bf8a-5be7f948d240.filesusr.com/ugd/45c6ff_a140d9315ad04df980619e89fd7aa384.pdf?index=trueIn PDF document text
    • http://gajutar.onlinewebshop.net/57980013082.pdfIn PDF document text
    • http://livixutufedesuv.epizy.com/21060791030.pdfIn PDF document text
    • http://jofiwevamixeta.epizy.com/88906870411.pdfIn PDF document text
    • http://fetapewifug.epizy.com/chuyn_i_t_sang_nh.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/xifuzijezosixizenivipinu.pdfIn PDF document text
    • http://kudogal.rf.gd/sesebufu.pdfIn PDF document text
    • http://dofurorumilu.epizy.com/bluestacks_32_bit_filehippo.pdfIn PDF document text
    • http://bapexuzajo.epizy.com/how_much_does_a_chick-fil-a_franchise_owner_make_a_year.pdfIn PDF document text
    • http://lewinozed.atwebpages.com/ikea_svarta_bunk_bed_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/24779604204.pdfIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_c88fc56468f54673a9c8470c60dc3002.pdf?index=trueIn PDF document text
    • http://tixinova.rf.gd/love_yourself_answer_album_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/48921254406.pdfIn PDF document text
    • https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_1f4ae4a6b04d4212b6317f2c3c691f7b.pdf?index=trueIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/ropesebewapojow.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_off0000d6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BE 5660 bytes
SHA-256: 8c5f82ef10d9a6ae624e5305032c20a1d8fddd90021d04f57dd943455c08a9df
font_01_sfnt_off0000e9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 10212 bytes
SHA-256: c14c7642d9aedde4e0c7c4ec772f6cfa7ee65ebdaf1f421c83f59c577c69ead0

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