Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95fb11ac42173f8…

MALICIOUS

PDF

109.2 KB Created: 2021-03-20 10:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f58abd74eebe351f87295f6c67124e86 SHA-1: 5b0fb075ef5296e6a2978afe00b4b8a1b31a75dc SHA-256: d95fb11ac42173f8c46e1ecb1ceadebf65f4c736fc7b6b4cf8129c420e5feab3
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9994

Heuristics 4

  • 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://bologen.ru/award?keyword=rig+veda+in+marathi+pdf+free+download PDF link annotation
    • http://mogimetekojubar.scienceontheweb.net/words_to_use_instead_of_responsible_on_resume.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370064/normal_5ff1dcdec65cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401517/normal_60126cb57e1b1.pdfIn PDF document text
    • https://tekemuwuva.weebly.com/uploads/1/3/0/7/130775778/valerimakibewaf.pdfIn PDF document text
    • https://cdn.sqhk.co/sokodajep/aghdwhb/20414000662.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369487/normal_5feec0502405a.pdfIn PDF document text
    • https://xomugiwonin.weebly.com/uploads/1/3/4/2/134266294/9268636.pdfIn PDF document text
    • http://virivuluk.getenjoyment.net/dumopukubatumitibaxime.pdfIn PDF document text
    • https://tesegape.weebly.com/uploads/1/3/5/3/135387632/fezamobozuva-lumexog-luguxazuz-tososafozonelab.pdfIn PDF document text
    • https://vawevoza.weebly.com/uploads/1/3/1/4/131482963/5273852.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477401/normal_5fc95d18af28a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_5ffceff07817a.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/hrIhhhb/gepasodepe.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/Wgihgjd/20950725769.pdfIn PDF document text
    • https://cdn.sqhk.co/mozigizax/igjeaij/gun_strike_3d_hack_mod_apk_download.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vojebijawutirus.rf.gd/game_saint_seiya_awakening_mod_apk.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/best_free_drawing_app_for_ipad_pro_12.9.pdfIn PDF document text
    • http://fuzadakeju.epizy.com/the_tragedy_of_macbeth_act_2_quiz_answers.pdfIn PDF document text
    • http://lusiwavi.rf.gd/suvisadevalezilovepon.pdfIn PDF document text
    • http://vuduluxepo.epizy.com/molecular_biophysics.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00018a7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18A7F 8392 bytes
SHA-256: 7dcf054ada121ecea66ca70d996361246f1477d6cd9425bc8649ef7d3113651d
font_00_sfnt_off000120fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FE 5436 bytes
SHA-256: 7a55ff52f3967d5b860aa688cefc28fa63424755162ab4f6ce69624ea42f5423
font_01_sfnt_off0001336e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336E 5584 bytes
SHA-256: 7368b40024bd10a0d217c6744070d18b15fbba6f9c887621652207dba36a79d8
font_02_sfnt_off000145a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A1 25524 bytes
SHA-256: eb7f635e895a89901ff2322231623d36703a1570afe1c61190462387f147509d

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